4speed questions.

[79ford302]

I have a 2wd 87 Comanche with a 2.5 4spd. I got a 4x4 trans and transfercase in with the deal, problem is it sat in the weather for a while and has quite a bit of water in it and the bell housing has a crack. I'm not sure which transmissions I have exactly but they look like they unbolt around the tail shaft. I figure I can't get this lucky but, can I swap the tail housings and bolt the transfercase to my 2wd tranny since I know it's good?

[Jeep Driver]

If I'm not mistaken the main shaft is different and the short answer is no.

 

Also, the ratios are different between the 4 and the 5.

 

I suppose you could combine the two if you knew what you were doing........swapping internals.

[79ford302]

I figured it wouldn't save me any time really. They are both 4speed trannys are the ratios still different? Thanks for the quick reply

[Eagle]

Also, the ratios are different between the 4 and the 5.

 

As far as I know, the ratios for gears 1 thru 4 are identical. The only difference is that the 5-speed has 5 speeds.

 

I would just swap the bellhousings and use the 4WD setup.

[Jeep Driver]

 

Also, the ratios are different between the 4 and the 5.

 

As far as I know, the ratios for gears 1 thru 4 are identical. The only difference is that the 5-speed has 5 speeds.

 

I would just swap the bellhousings and use the 4WD setup.

 

 

 

 

Some guys here report that the 4 speed will come with 3.55 ratio rears whereas the 5 speed comes with 4.10s and claim the gear box ratios are different.

 

I have no experience with the AX4......so I'm just going by what I read.

 

Moot anyway as both of his are AX4s....somehow I missed that.

 

But he claims that the 4X trans as water in it.

 

 

 

 

 

OP, Mine did too when I got it.

Drain the fluid and inspect........I got 40K miles out of mine before I swapped to a different AX5.

[mnkyboy]

 

Also, the ratios are different between the 4 and the 5.

 

As far as I know, the ratios for gears 1 thru 4 are identical. The only difference is that the 5-speed has 5 speeds.

 

I would just swap the bellhousings and use the 4WD setup.

 

Eagle is correct, the gearing difference is in the axles.

[79ford302]

Thanks guys. Guess I'll swap the bell housings and throw the other tranny in for now. The water in it scares me a little but it's just gonna be a beater truck for now. Planning to swap a 4.0 5spd setup in it once the axles and suspension are where I want them. Thanks again.

[mvusse]

There is a difference in at least 1st gear between years, I had an 1988 AX4 when I got the truck, 4th gear synchro was missing (physically not there). I bought a 92 AX5 with shot synchros in 1st and 2nd, but 3rd and 4th were fine. I tried using the 92 cluster gear with the 88 main shaft and it just would not fit together. When I counted teeth on the gears I noticed 1st gear having different ratios for the two.

 

2nd through 4th were identical, though.

 

And yes, short wheel base would get an ax4 and 3.55 axle gears, long wheel base would get an ax5 and 4.10 axle gears. 4th gear with 3.55 final drive ratio is identical to 5th gear with 4.10. To the AX5 with 4.10 gears had a lower final drive ratio for 1st to 4th, presumably to get a heavier truck/heavier load moving easier.

 

I run an ax5 in a short wheel base with 3.55 gears. 5th is absolutely gutless, but cruising at 75 mph it gets me 24 mpg while 4th (with the ax4) only got me 19.

[mnkyboy]

I wonder what the difference is? From what I've found they are all listed as 3.93; 2.33; 1.44; 1.00; 0.85; 4.74 (Reverse) reguardless of year.

 

I have noticed that some sources say 3.92 for 1st and some say 3.93 otherwise they are identical.

[mvusse]

I should have written down the teeth count. Can't for the life remember me what the ratios were.