Topic: G58 adapter

[yp_urslf]

im looking for an adapter to mate a G58 tranny with the transfercase off of a W56 tranny.  marlin make one?

[79coyotefrg]

have you tried  to just stick it in there   but i think they have the same bolt pattern

[79coyotefrg]

btw  i would use the w56 tranny also if you have one

[yp_urslf [OP]]

i dont have it yet, so i cant really look at it to see if it'll work.  heres my situation:  i have a 90 4runner with a G58 and chain tcase.  i can get a dual gear driven tcase setup off of a W56 tranny.  i'd like to keep my G58 if i could because i know nothin is wrong with it and it shifts fine, i can get the W56 if i need to, but i need to buy it all at the same time if i need the tranny also.

[79coyotefrg]

i'll get ya  someone that knows for sure 

[BigMike]

Negative.

An adapter could be made, but I believe that it is more work than what it is worth. For starters, the G58 was only offered from 1989-95 in trucks that had Autolocking front hubs for 4WD shift-on-the-fly ability, which limits the amount of customers we see who need parts for a G58. But more detrimental to this problem, is that the transfer case shift rail height is lower for the G58-chain drive t/case setup than with the RF1A gear drive t/case setup, so even if we did make an adapter to put a gear drive t/case behind a G58 transmission, we would either need to make customer shift rails to account for this height offset, or we would need to make a special shifter that had a longer throw (which no one would want).

So in general, we strongly recommend you to consider upgrading (a W56 is stronger than a G58) to any W56-type transmission from 1985-99, understanding that there are two basic models available, one from 1985-88, and the other from 1989-95, short and long forward shift t/case rails respectively.

Regards,
BigMike

[yp_urslf [OP]]

ok, thanks alot bigmike.  and a W56 would bolt up to my motor with no problems?  even the slave cylinder?  thanks again, its hard to find info on the G58, i guess no one (including me) wants one.

[79coyotefrg]

when you get the w56  try and get the clutch fork  and  throwout bearing parts

[Total Distorsion]

I just ran into the same problem, sort of. The tranny in my 85(w-56) is making noise in reverse, so I was going to swap it out with a tranny my friend had. It turns out its a G-58. I was looking all over for info but all I came up with that it has 26 splines vs 21/23. I didn't know about the shift rails. Maybe I'll just rebuild it.