Posted: Tue Oct 01, 2019 4:12 pm Post subject: SPEEDOMETER DRIVEN GEAR AND BUSHING
I am restoring an M38.
This jeep has only chassis and body!
I am rebuilding all parts to recover and be able to bring you back to the glory times !!!
I got several used and original pieces in perfect condition, but I have a problem that I can't solve.
The transmission I'm using is a T90 that came from a CJ3A model, and I already bought the original NOS speedometer cable.
But I don't know which SPEEDOMETER DRIVEN GEAR AND BUSHING to use, could anyone help me with this question?
I also don't know where to buy this piece because I already checked with PETER DEBELLA, MIDWEST MILITARY, ARMY JEEP PARTS, among other suppliers.
With the information you have provided me, I can clearly understand the correct parts for each version of M38.
But when using a CJ3A Model T90 transfer, can I make parts compatible?
I mean, use original speedometer panel instrument, original NOS speedometer cable, so what gear should I buy (LONG OR SHORT)? Is it possible to make it work this way?
You keep mentioning CJ3A. Which jeep are you working on? The CJ3A or the M38?
If you have the civilian Transfer the only difference between the CJ3A transfer and the M38 Transfer is the shift levers mounting shaft. The M38 transfer uses a special bolt with a built in grease fitting. As long as transfer came from behind the stock CJ3A T-90 trans then the ratio will be the same for the speedo gears. Drive gear 4 teeth and driven gear 15 teeth. If you do have an M38 and want accuracy in your restoration then use the correct length gear, sleeve & cable for your jeeps serial number. If not use either as a set. You cannot mix and match. Long gear has to mount with long sleeve and short gear has to mount with short sleeve.
I also don't know where to buy this piece
Note that my lists below include the federal stock numbers for the gear and sleeves. It helps to be able to google search your browser using these numbers. To alter the given federal stock numbers to use them as National Stock Numbers just add two 00- after the first four digits and dash. IE:
Driven Gear 15 t Long late: SP# 18-453-10, SW# 448361, WO# 806718, ORD# 8328480, FSN 2520-040-2483, NSN 2520-00-040-2483 (M38late/M38A1/M170)
In your future posts you will not have to remember to post your Jeep model first if you just add the Model and year of your jeep to your signature block in your profile. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
I am working on an M38.
But when I bought the Jeep, there were only chassis, rear and front axle, and body.
All the other parts I am buying, so I installed a transfer of CJ3A, model T90, but I already changed the cover for a model of M38, because the lever is different!
So I have an M38, but the transfer case and engine set I got from a CJ3A to make it work.
I think I could explain it better?
About your explanation of the parts, I think I get it.
I'm going to buy a long or short set, both can work perfectly on my Jeep, but should I buy both long pieces, or both short pieces, so will I have a perfectly working set?
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