what manual trannys will fit in my 88 half ton truck

[K5-newf]

what manual trannys will fit in my 88 gmc serria and that will work with my np241?? My truck has a crappy 700r and the t-case is 27 spline ... i think the manual trannys are 30 or 32 spline. I can interchange the out put shafts if needed.

btw the nv 4500 is out of my question unless i can find a deal on one.


Heres some pictures of the old girl .... 350fi 700r and np241 has 2 inch body lift and i may crank another inch... got a 60 that may go under it next year.

And a picture of the bumper that i started building in school....

 

[shaun89]

i think ur best bet is to find the tranny that goes OEM to that gen. truck, and i know what you said but the nv4500 is a good one....

 

[AJMBLAZER]

I know the SM465 was used for a few years in the heavier trucks and the NV3500 was used in the half tons before GM went entirely over to the NV4500.

The NV3500 wasn't known for it's durability.

 

[coloradoblazers]

define "fit"? if you are looking for a 'direct' bolt-on, a nv4500 is the easiest, but if you want to do a little work(and juding by that bumper you have fab skills) a sm465 would work, and you could find a matching 32 spline t-case to work with it for around $300. As far as the clutch goes, find the pedals off the same model as yours, and go w/ a hydro set up. I plan on swapping a sm465 into a 95 sierra, then swapping a 4500 into a yukon. hope that helps.

 

[K5-newf]

I would love to have a nv4500 but i know on the 73-87 it requires a stand alone computer not so sure about the 88 and up rigs but either way its a expensive swap. My old 84 had the sm465, although it was 2wd it stil lwas a tough tranny. Im thinking the sm465 is goning to be the best route to go.

Another question will a out put shaft on 2wd verison of the sm465 swap with one on a 4x4? And will all gm sm465 work even the one from the older style?


Thanks for all the help... Jason


Oh and btw Thanks on the bumper comment. I just started first year welding back in sept and before that i never touched a welder. Its 1/4 diamond plate and 7018 rod. I love fabing stuff up.

 

[AJMBLAZER]

Why would a NV4500 require a computer? It's a MANUAL transmission.

 

[K5-newf]

my bad i got mixed up with the 4l80 i think.... blonde moment... good thing this anit pirate

 

[AJMBLAZER]

It's cool. I figured you were thinking of the 4L80E for a moment there.

 

[b454rat]

Not to hyjack, but I have a 4500 for $250, need to get rid of it.

 

[K5-newf]

man if shipping wasnt a factor you could consider that sold... Im sure some lucky ck5er is close buy and would be interested in it.

 

[MaxPF]

The SM465 with a 241 should be a direct bolt-in. Find a NBS 4-speed 4WD for the tranny, t-case, bell housing, etc. OBS 465's won't have the shift tower in the same place, but they can probably still be made to work.

You have to use a 4wd 465 - the 2wd versions have a 35 spline output shaft that is incompatible with any t-case.