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Thread: Question for Lee Mann, drive axle replacement parts?

  1. #1
    100+ Posts Scott1's Avatar
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    Default Question for Lee Mann, drive axle replacement parts?

    Original owner, I have a Lehman Valkyrie Interstate Trike, kit #YS-0200767, built 9-14-2002. Solid axle, I believe it is a ford. I need all information for the drive axle replacement parts.

    (1) Drum brake shoes? I have a parking brake.

    (2) Axle seals?

    (3) Axle bearings?

    (4) Differential seals @ drive shaft?

    (5) Differential cover gasket?

    (6) U-Joint?

    (7) Any other parts I may need to replace?

    I look forward to your reply and if you have any questions please ask.

    Greg
    [SIGPIC][/SIGPIC]
    2008 GL1800 Level 3 W\2009 Motor Trike Adventure IRS Kit
    1999 Valkyrie Interstate W\2001 Lehman Predator Trike Kit
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  2. #2
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    Greg,

    The rear axle for the Lehman trike shaft driven models was a variation of the Ford 6 3/4" rear used in the Mustang II and Bobcat. Initially the axle was for 1971-1978 model and later Lehman used 1979-1981 models.

    In 1999 Lehman used the earlier model axle as a model and had their later axle manufactured overseas (India) based on the 1971-1978 model.

    Some kits built after 1999 still had the 1979-1981 modified rear axle with a 25 splined axle shaft.

    The 1971-1978 had a 23 splined axle.

    The gears for the differentials, the differential case carrier and the differential case were all copied from the 1971-1978 design.

    Since the rear axles were shortened, they were also manufactured overseas.

    Brake drums and shoes were for the same models but wheel cylinders and shoes have changed over the years.

    The kit number or axle number you provided will not help me identify the rear.

    Two different covers were used, a square cover and an octagonal cover.

    Although prevalent at the time, local parts suppliers have stopped stocking some of these parts (brake parts) and all of the OEM axle parts (depending on the specific axle) are virtually non-existent.

    I still deal with the manufacturer in India so some of these parts are still available.

    The ring & pinion gear sets are no longer being manufactured and the remaining inventory should last 7-10 years according to past replacement numbers.

    A picture of the rear cover is worth a 1000 words.

    Lee
    Jim Murphy
    EX-Lehman & Champion Dealer Owner Operator
    Iron Butt Rider 2001

    WHEN HELP IS OFFERED, A SIMPLE "THANK YOU" IS APPRECIATED.

  3. #3
    100+ Posts Scott1's Avatar
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    Hi Jim,

    I have attached a picture of the rear cover and both sides. Hope the pictures helps.

    Sorry for the large pictures, I thought they would be thumbnail size.

    Greg

    Click image for larger version. 

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    [SIGPIC][/SIGPIC]
    2008 GL1800 Level 3 W\2009 Motor Trike Adventure IRS Kit
    1999 Valkyrie Interstate W\2001 Lehman Predator Trike Kit
    2021 Can-Am Spider F3 Limited (Girlfriends)
    2009 Vulcan 900 Classic, full dresser (Girlfriends)
    2019 Coachmen Catalina Trail Blazer 30' Toy Hauler/Camper

  4. #4
    100+ Posts Scott1's Avatar
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    Hi Jim,

    I have been reading posts for a few hours trying to do some self-help. I found 2 (.pdf's) that look like the information that I was asking about.

    Diff Parts Diagram.pdf and Drum brake part info.pdf

    Are the 2 documents (pdf) correct for the pictures that I have in my last post? For a 2002 solid axle with drum brakes?

    Would you recommend different parts or are these parts good replacements?

    1 last question, to change out the final gear lube, how many quarts do I need?

    Thank you for all the knowledge you provide and time that you expend answering questions where information is so hard to obtain.

    Greg
    [SIGPIC][/SIGPIC]
    2008 GL1800 Level 3 W\2009 Motor Trike Adventure IRS Kit
    1999 Valkyrie Interstate W\2001 Lehman Predator Trike Kit
    2021 Can-Am Spider F3 Limited (Girlfriends)
    2009 Vulcan 900 Classic, full dresser (Girlfriends)
    2019 Coachmen Catalina Trail Blazer 30' Toy Hauler/Camper

  5. #5
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    Quote Originally Posted by Scott1 View Post
    Hi Jim,

    I have been reading posts for a few hours trying to do some self-help. I found 2 (.pdf's) that look like the information that I was asking about.

    Diff Parts Diagram.pdf and Drum brake part info.pdf

    Are the 2 documents (pdf) correct for the pictures that I have in my last post? For a 2002 solid axle with drum brakes?

    Would you recommend different parts or are these parts good replacements?

    1 last question, to change out the final gear lube, how many quarts do I need?

    Thank you for all the knowledge you provide and time that you expend answering questions where information is so hard to obtain.

    Greg
    Greg,

    Some of the parts are the same.

    Obviously the rear differential cover gasket is not and the internals are also different.

    The axles may be 25 spline and they would be different too.

    When adding oil to the rear, fill below the plug (3/4").

    Jim
    Jim Murphy
    EX-Lehman & Champion Dealer Owner Operator
    Iron Butt Rider 2001

    WHEN HELP IS OFFERED, A SIMPLE "THANK YOU" IS APPRECIATED.

  6. #6
    1250+ Posts CrystalPistol's Avatar
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    I have this list

    Description Lehman Number Vendor Part Number Vendor

    Brake Shoes GB1118 474RP RaybestosLt Brake Adjuster Kit GB1110 2592 EIS

    Rt Brake Adjuster Kit GB1112 2593 EIS

    Brake Spring Kit GB1124 7157 EIS

    Wheel Cylinders GB1122 EW34958 TRU-TECH

    Diff. Cover Gasket (octagon) GG0650 RDS 13073 Fel Pro

    Diff. Cover Gasket (square) GG0650-0 RDS 55323 Fel Pro

    Axle Bearing GB1001 RW207 CCRA BCA

    Axle Flange Gaskets GG0600 n/a AGSPark Brake Cable GB1114 370100 ABSCO

    Brake Drum GB1120 857 ITT

    Axle Stud CS1001 560-186 Papco

    Brake Shoe Retainer GB1119 D7TZ2028B Ford

    Pinion Seal GS1056 8181 NA National

    Axle Seal (25 spline shaft drive) - GS1052 3214 National

    Axle Seal (23 spline shaft drive) - GS1050 3199 National

    Speedi Sleeve (shft drv) GS1058 99181 National



    I know to check / compare, but so far it's proven accurate for mine converted in '98. I haven't had occasion to check splines, but may do that this spring service (has Amsoil lube in it now). Mine has the same "square" cover, looks like Indy (4 straights and 4 turns). I usually start with lookup for 1980 Pinto. I can get all the brake parts & drums still, don't have the parking brake, gotta take care of axle bearings … and that ring & pinion though.
    Make Courtesy Your "Code of the Road" too!

  7. #7
    1250+ Posts CrystalPistol's Avatar
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    Quote Originally Posted by Lee H. Mann View Post
    Greg,

    The rear axle for the Lehman trike shaft driven models was a variation of the Ford 6 3/4" rear used in the Mustang II and Bobcat. Initially the axle was for 1971-1978 model and later Lehman used 1979-1981 models.

    In 1999 Lehman used the earlier model axle as a model and had their later axle manufactured overseas (India) based on the 1971-1978 model.

    Some kits built after 1999 still had the 1979-1981 modified rear axle with a 25 splined axle shaft.

    The 1971-1978 had a 23 splined axle.

    The gears for the differentials, the differential case carrier and the differential case were all copied from the 1971-1978 design.

    Since the rear axles were shortened, they were also manufactured overseas.

    Brake drums and shoes were for the same models but wheel cylinders and shoes have changed over the years.

    The kit number or axle number you provided will not help me identify the rear.

    Two different covers were used, a square cover and an octagonal cover.

    Although prevalent at the time, local parts suppliers have stopped stocking some of these parts (brake parts) and all of the OEM axle parts (depending on the specific axle) are virtually non-existent.

    I still deal with the manufacturer in India so some of these parts are still available.

    The ring & pinion gear sets are no longer being manufactured and the remaining inventory should last 7-10 years according to past replacement numbers.

    A picture of the rear cover is worth a 1000 words.

    Lee
    Jim,

    I have a question please.


    Have you noted any correlation between axle years &/or spline count and the type of rear cover used? I've seen the octagon shaped one on some early '70s Pintos, etc, (maybe '71-'78?) but I think the square or "Indy style" were later (like maybe the '79-'81 years)? I noticed a 2003 Lehman manual shows a octagon looking rear in the drawing, but my '98 GTL has the square one?

    I figure if anyone has looked at it close, it's you.



    Thank You
    Make Courtesy Your "Code of the Road" too!

  8. #8
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    The 1978 and earlier 6.75" rear axle had the octagonal cover while the 1979 had the square cover.

    Back when they were building those rear axles they would travel all over the US and Canada looking for those rear housings.

    I know there are part number differences for things such as the differential carrier and differential kit.

    I have seen several with 4 pinion carriers instead of 2 but can't remember the axle spline count.

    And I know that there are different axle spline counts.

    What I don't know is what differences really exist between the two.

    I know that they take 2 different pinion bearings too.
    Jim Murphy
    EX-Lehman & Champion Dealer Owner Operator
    Iron Butt Rider 2001

    WHEN HELP IS OFFERED, A SIMPLE "THANK YOU" IS APPRECIATED.

  9. #9
    1250+ Posts CrystalPistol's Avatar
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    Thank You Jim.

    We had a '72 Pinto with 4cyl & auto as a spare car made from two wrecks welded together across the roof (it was cheap, but it never left one to walking), etc and a buddy of mine had a '74 Mustang II "Mach 1" that had a V-6 & 4 speed, they both had the octagon shaped cover, but my buddy broke his once, likely jamming gears even though it wasn't fast. Later, after getting married, I bought my wife a '76 that had a new remanned 2.3 4cyl & auto trans, it too had the octagon cover. I did once see a Pinto on a lift at a gas station I worked at had a Ford 8 inch rear with the hogshead that dropped out the front, looked "overkill".

    Quote Originally Posted by Lee H. Mann View Post
    The 1978 and earlier 6.75" rear axle had the octagonal cover while the 1979 had the square cover. … etc …
    I know we are drifting, but I thought I'd share a link to a thread that has some interesting points about the 6.75 rear axles. Post #12 in particular.

    http://vb.foureyedpride.com/showthre...-6-75-rear-end

    If I rode only mountains or always pulled a trailer, etc, I bet that 3.45:1 ratio (like running really short rear tires) would wake it up?

    But I'm just talking out loud … & … I am just gonna take care of mine as best as I can.

    Make Courtesy Your "Code of the Road" too!

  10. #10
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    You would probably be buzzing 4K RPM's at 70 MPH......
    Jim Murphy
    EX-Lehman & Champion Dealer Owner Operator
    Iron Butt Rider 2001

    WHEN HELP IS OFFERED, A SIMPLE "THANK YOU" IS APPRECIATED.

  11. #11
    100+ Posts Scott1's Avatar
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    Lehman picked a solid axle rear end (Ford 6.75") that is so outdated that common replacement parts are unavailable or are becoming unavailable. I am purchasing a complete set of seals, gaskets, bearings, wheel cylinders, and driveshaft u-joints (all ware parts) so I have 1 complete set of spare parts. I can do my own repairs, but I need the replacement parts. Buy now or cry later.

    I was looking for an aftermarket differential cover for the Ford 6.75" rear end. I wanted to get one that had a drain plug so I can change the gear oil without removing the cover every time. I found that no one makes a replacement differential cover with or without a drain plug (Google search). So, don't destroy your differential cover thinking you can order a replacement. I only found badly rusted covers on eBay. I could weld in a drain plug, in the differential cover, but I was looking for an easier way by purchasing a new cover.

    Greg
    [SIGPIC][/SIGPIC]
    2008 GL1800 Level 3 W\2009 Motor Trike Adventure IRS Kit
    1999 Valkyrie Interstate W\2001 Lehman Predator Trike Kit
    2021 Can-Am Spider F3 Limited (Girlfriends)
    2009 Vulcan 900 Classic, full dresser (Girlfriends)
    2019 Coachmen Catalina Trail Blazer 30' Toy Hauler/Camper

  12. #12
    1250+ Posts CrystalPistol's Avatar
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    Quote Originally Posted by Scott1 View Post
    Lehman picked a solid axle rear end (Ford 6.75") that is so outdated that common replacement parts are unavailable or are becoming unavailable. I am purchasing a complete set of seals, gaskets, bearings, wheel cylinders, and driveshaft u-joints (all ware parts) so I have 1 complete set of spare parts. I can do my own repairs, but I need the replacement parts. Buy now or cry later.

    I was looking for an aftermarket differential cover for the Ford 6.75" rear end. I wanted to get one that had a drain plug … etc …
    I have my method of adding a drain plug of 1/2-20 thread (I do this for my transmission pans), but then the subject of drilling to fit a Dodge rubber plug came up. It's not a big deal IMHO, as it's not something done really often like engine oil changes, and removing the cover lets one clean / drain the rear axle housing really well.

    When they picked the 6.75" rear, they were plentiful, they were all over the place. They still are "out there", they are lighter than some alternatives, plenty adequate for the task, and preferable to using some rear end I never heard of maybe created in outer Mongolia I think. Seals, gaskets, bearings, wheel cylinders, brake parts, (pretty common 9" Ford drum brakes) and driveshaft u-joint will be available for a long time, it's the short axle shafts and ring and pinion or spider gears that will get scarce. Biggest danger to anything I think is danger of axle seal leak going un-noticed leading to low lube level leading to bad axle bearing and then miles eating up an axle itself. Not real likely as the bearing has it's own inner race though, unless not noticed for a long ways.

    No welding risk to the cover or pan, I weld a 1/2-20 nut to a piece of 1/8" steel after drilling a 15/32" hole, then run a 1/2-20 tap through. Use two 1/4-20 bolts to secure it in place in pan with just one 1/2" and two 1/4" holes drilled. I use red locktite on the 1/4" bolts, even peen the threads on occasion, use a regular drain plug (magnetized maybe) & sealing washer. Have not done it on diff cover, but it'd work just dandy. I made a few last time to have on hand. Put it in a place that doesn't interfere with mechanicals (ring gear). Looks crude, but works, no leaks with hot ATF or MerconV. I liked the rubber plug idea too, just get extra plugs.
    Make Courtesy Your "Code of the Road" too!

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    Jim,

    When I was cleaning inside the differential I found stamped # 3537 at the top of the differential case. On the ring gear the # 3537 was etched into the gear. See picture for locations. Do these numbers cross reference to any information about the rear end? Could Lehman supply any information using this differential number (3537) or axle kit # YS-0200767 ?

    Thank you, Greg

    Click image for larger version. 

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    Cool

    The ring gear has a series of numbers and letters.

    Count the ring gear and pinion teeth.

    Any casting numbers and where they were located.

    See if you can send me all of the numbers in their particular groups and I will try to find out what those numbers tell me.

    Jim
    Jim Murphy
    EX-Lehman & Champion Dealer Owner Operator
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    Jim,

    The numbers (3537) were hand punched into the top of the differential casing where the gasket goes and also engraved with a vibra tool into the ring gear spacer as marked in the attached picture.

    Ring gear is factory marked (D97W 4210-BA-1541) I will count the teeth on the ring and pinion before I close it up.

    Greg

    Click image for larger version. 

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    Quote Originally Posted by Scott1 View Post
    Jim,

    The numbers (3537) were hand punched into the top of the differential casing where the gasket goes and also engraved with a vibra tool into the ring gear spacer as marked in the attached picture.

    Ring gear is factory marked (D97W 4210-BA-1541) I will count the teeth on the ring and pinion before I close it up.

    Greg
    Greg,

    The D97W-4210-BA is really D9ZW-4210-BA and comes back as a ring gear, part of a ring & pinion set.

    D7FZ-4209-A is the ring & pinion set number and fits a 77-78 Pinto, Mustang with a 6 3/4" rear axle.

    The ratio for that set is 2.73:1 (15 pinion 41 ring).

    Problem or issue ???

    The 77-78 Pinto, Mustang had an octagonal rear cover and yours is square (1979).

    Your picture shows 79 type bearing shims instead of a 78 and earlier threaded case pre-load adjuster.

    See if you can look on either side of the carrier for a casting number.
    Jim Murphy
    EX-Lehman & Champion Dealer Owner Operator
    Iron Butt Rider 2001

    WHEN HELP IS OFFERED, A SIMPLE "THANK YOU" IS APPRECIATED.

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    Hi Jim,

    Just gonna say it's good to see your posts, I missed some of them, was a little mildly worried. Hope all is well, maybe just busy with shop?

    Was following thread, thinking about those shims, 3537 would seem to be set up notes maybe, like maybe left & right shim thickness for that carrier in that housing with those gears? 0.035" & 0.037"? I wasn't there.

    Tried to PM, no good,

    Take Care … Les
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    Quote Originally Posted by CrystalPistol View Post
    Hi Jim,

    Just gonna say it's good to see your posts, I missed some of them, was a little mildly worried. Hope all is well, maybe just busy with shop?

    Was following thread, thinking about those shims, 3537 would seem to be set up notes maybe, like maybe left & right shim thickness for that carrier in that housing with those gears? 0.035" & 0.037"? I wasn't there.

    Tried to PM, no good,

    Take Care … Les
    The pre-load shims are much thicker.

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    77-78 6.75" housing with adjustable carrier pre-load and locks.

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    The actual adjuster and lock.

    Click image for larger version. 

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    The pre-load shim used in the 79.
    Jim Murphy
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    I could see the shims in the pic, I just couldn't measure them.

    It was just a thought.
    Make Courtesy Your "Code of the Road" too!

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    Quote Originally Posted by Lee H. Mann View Post
    Greg,

    The D97W-4210-BA is really D9ZW-4210-BA and comes back as a ring gear, part of a ring & pinion set.

    D7FZ-4209-A is the ring & pinion set number and fits a 77-78 Pinto, Mustang with a 6 3/4" rear axle.

    The ratio for that set is 2.73:1 (15 pinion 41 ring).

    Problem or issue ???

    The 77-78 Pinto, Mustang had an octagonal rear cover and yours is square (1979).

    Your picture shows 79 type bearing shims instead of a 78 and earlier threaded case pre-load adjuster.

    See if you can look on either side of the carrier for a casting number.
    Jim,

    I counted the teeth on the ring gear (total 41) and pinion gear (total 15) teeth.

    Ok, the ring gear markings are D9ZW-4210-BA. The Z looks like a 7, poor incomplete punch mark.

    Yes, the differential cover is square in shape, not octagonal.

    I looked at the markings on the part to the left of the ring gear and it had D9BW BA and a #10 with what looked like (GB in a circle).

    The part to the right of the ring gear was marked 9E23 and had 7 razed dots in the casting.

    I'm not having any problems, all parts have very little play, if any, when turning by hand. I was just looking for information about my Lehman kit and replacement ware parts (seals, bearings and brake parts) just in case a problem does happen. I hope I never have to disassemble the rear drive other than changing the differential oil.

    Thanks, Greg
    [SIGPIC][/SIGPIC]
    2008 GL1800 Level 3 W\2009 Motor Trike Adventure IRS Kit
    1999 Valkyrie Interstate W\2001 Lehman Predator Trike Kit
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    2009 Vulcan 900 Classic, full dresser (Girlfriends)
    2019 Coachmen Catalina Trail Blazer 30' Toy Hauler/Camper

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