Transmission Swap; 700r4 to sm465

[bikes&bowties]

I have an '84 chevy k10 (4x4) with a 700r4 that is pretty much done. And not that it matters but its a 305 right now but i have the 350 im dropping in it already which is what the Sm465 would be going onto. Instead of spending money on something I dont want (an automatic transmission) I'd rather just swap it out for a manual (sm465) because to me if im going to be driving an old truck it only right for it to be a manual. I just have a few gaps im missing and after searching i know people have done this swap I just cant find exactly what i want.

List of what I know i need

SM465 with bellhousing
flywheel
pilot bearing
clutch pedal and linkage

Now what i dont know is..

Will I need a different crossmember
Im guessing a different transfer case depends on what spline mine is?
Will I need a different (taller) transmission tunnel..

Thanks!!

[b454rat]

Will I need a different crossmember?

This depends on what t-case your gonna use. I have the same year truck, and did the same thing as you. I used a 205 from an 86 1 ton. IIRC the stock flat crossmember would work, but you need to lower the crossmember and raise the t-case. I think I used some bolts or something like that. Any type of spacer will work. I think I ended up using a c/m off an 80 3/4 that has a drop to one side to clear the t-case.


Im guessing a different transfer case depends on what spline mine is?

Depends what year tranny you are using. The early ones, pre 84 maybe? used 10 spline with a coupler sleeve. After 84/85, they went to a 32 spline male. You could swap the input to a 32 on your t-case, then would need an adapter. Or find a 205/adapter from an 85-91 1 ton, and never worry bout it again.

Will I need a different (taller) transmission tunnel..

Nope, 4wd will have the tall tunnel, just cut a hole for the shifter, and start bangin' gears.

[bikes&bowties]

Wow. Thanks for that awesome reply. By any chance do you have pictures of your clutch linkage and how you rigged up the clutch pedal?

[2tons of fun]

you will need to get the pedal hanger from a clutch truck, the entire hanger, witch means yanking the steering colomb down, the brake booster off and the same again for yours. you can make yours work but you will still have to pull it to do the work.

[bikes&bowties]

Originally Posted by 2tons of fun

you will need to get the pedal hanger from a clutch truck, the entire hanger, witch means yanking the steering colomb down, the brake booster off and the same again for yours. you can make yours work but you will still have to pull it to do the work.

wait so you are saying to pull the pedal hanger i have to remove the steering column and brake booster. And that if i cant get a pedal hanger from a clutch truck then i could just modify mine to work

[2tons of fun]

yes, but you will have to pull yours to be able to do the work in the first place.

[rcbildr]

I've done that swap feel free to send me an email and I'll go over all the details. I don't have time right now to post up all the info...work is keeping me busy. rcbildr@hotmail.com

[bikes&bowties]

Originally Posted by 68 TT

The reason I ask where in Washington is because my truck is an SM465/NP205 with Dana-44 front and 14-bolt rear and I am going to convert it to an automatic in the spring so my truck could be a pretty good donor vehicle for you.

I assume you have 10-bolts front & rear and an NP208 transfer case. Am I right?

You will probably need some conversion U-joints and if your truck is a short bed you will have to shorten the rear driveshaft but that is it.

PM me and we can try to work something out if you are close enough.

I am in Quincy. Being 15 the 2.5 hour one way drive would be a bit difficult.. Plus I will need the parts a bit sooner than spring hopefully. but if all other good ideas fail I will keep this option at the top of my mind. I really appreciate it though.