Transmission swap help ! T150 - T4 not matching up

[mmokka]

Hi guys,

I picked up a 1977 CJ7 (I6-AMC 258 i6 / 4.2l Engine, T-150 , Dana 20 ), unfortunately 1st gear was totally gone (seem that the gear ring is just totally shot)

So I went around looking for a replacement tranny, and I came across what seems to be a T-4 with Dana 300 Transfer Case and matching driveshafts.

I dropped the T-150 today, just to find out that the bell housings are not compatible and even the input shaft on the T-4 is different than the T-150 .

My OEM bell housing hole pattern does not fit the T-4 .. and the bell housing that was in the T-4 does not matches my AMC 258 i6 / 4.2l engine block.. totally different.

SO ! I need help...

1. Is what I think the T-4 , really a T-4 ? It has stamped 13-51-027-901
(according to Novak website, it should be a T-4 , unless I'm missing something)

2. Shouldn't the T-4 be a direct replacement to the T-150 ?

Any input appreciated !

 

[Bent]

I would probably sell the Dana 300 and buy an adapter for a Ford T-18 to the Dana 20 . The ford T-18 will bolt up to the T-150 bellhousing (the jeep T-18 won't) and the input shaft dimensions will be the same as the T-150 . The overall length may be close enough to the T-4 /Dana 300 to use the driveshafts.

 

[caveman]

No. It is not a direct replacement but it will fit. You need a diferent clutch and bellhousing. Best bet would be to buy a clutch preasure plate kit. It comes with everything you'll need. Find a bellhousing from a later 80s 6 cylinder jeep. Most of them are drilled for about any transmision that came in the jeep.
You will also need to shorten your rear driveshaft and lengthen the front.

 

[Hedgehog]

Or you could rebuild your T-150 . The AMC 150 is fairly decent Transmission with quite a few parts still available, until you drop in a Ford T-18 you won't see a big improvement in over all durability from any of those mentioned. The T-4 is a Transmission I'd stay away from. It's only slightly better than the much hated SR4 .