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manual trans conversion

G

general blaze

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Ok i have an 83 blazer with the 6.2 ltr diesel and had a 700r4 in it. i have recently blown the tranny and i want to go with a manual trans. my question to you guys is what manual trans should i get? and how hard will this be. i want a heavy duty trans if possible because i do pull a trailer with this truck every once in a while.

Another question is will i have a fitment issue with my transfer case..


thanks a lot guys.
 
thanks for the head start. what transfer case would i need to use the nv4500. is my stock one fine?
 
You probably have a 208 i'd say. Not sure on if the NV4500 will bolt up but if i'm thinkin right they have the NP241 transfer?? I can't remember if the 208 will bolt right up without problems though. :dunno: I'd just find the tranny and transfer combo and go that route

I put the SM465 in my Blazer with little trouble. Kinda a pain in some areas but i got it working right and will never go back to an auto.

If ya need any help just PM me
 
32 spline 208 with the 6 bolt pattern should bolt right up to an NV4500, same goes with a 32 spline 241. Either transfer case will also work with a 32 spline SM465 :) The major difference between the two is that the NV has OD. Both have reasonably similar gear ratios (particularly the early Chevy NV vs the SM). Both have granny first gears, and both are very tough.

The SM465 is an easier transmission to swap in, you can pretty much bolt it right up. I'd suggest you go with a hydraulic clutch to simplify things, and make the left leg effort a bit simpler.

That said, the OD of the NV is fantastic on the highway.
 
Russell said:
32 spline 208 with the 6 bolt pattern should bolt right up to an NV4500, same goes with a 32 spline 241. Either transfer case will also work with a 32 spline SM465 :) The major difference between the two is that the NV has OD. Both have reasonably similar gear ratios (particularly the early Chevy NV vs the SM). Both have granny first gears, and both are very tough.

The SM465 is an easier transmission to swap in, you can pretty much bolt it right up. I'd suggest you go with a hydraulic clutch to simplify things, and make the left leg effort a bit simpler.

That said, the OD of the NV is fantastic on the highway.
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thanks for the info i found the 465 to be a bit cheaper and i am all for the one that is easier. if i find a 465 tcase combo will it bolt right onto my 6.2 with just minor add ons?
 
i found this deal on the internet would this work for what i am trying to do?

Compound low SM465 4 speed and NP205 transfer case from Chevrolet truck. Worked good when removed. Gear oil is clean, uncontaminated and smells delightful! Great for crawler truck/Jeep/Landcruiser project. Tim (951) 323-7271.
010109010401010303200801160e67aec930d3fb695100be87.jpg
 
How much are they asking is the first question. Then you have to make sure it's in decent condition cause you can't really tell from that pic.

but that's what i have and it's great. You'll have to find pedals, a bellhousing, and linkages and such though unless of course you went hydro then you could just by the kit and do away with the linkages
 
he wants 250 and its local.

where do i get said hydro kit. i heard that was the easier way to go.

and as far as a pedal assembly what one would work best.

also do i have to get another bell housing or will the one that matted my 6.2 to my 700r4 work just fine.

thanks for all the help guys. i want to start this projet this weekend.
 
general blaze said:
he wants 250 and its local.

where do i get said hydro kit. i heard that was the easier way to go.
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there is a post around here close you can look for. I'll se what i can find and come back

and as far as a pedal assembly what one would work best.
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pretty much anyone from 73 to 87 i believe

also do i have to get another bell housing or will the one that matted my 6.2 to my 700r4 work just fine.
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Well you can't take the bellhousing off your 700r-4 so you'll just have to find one. Maybe a local junk yard might have one??

Good luck on the project

EDIT: here's some info on what you need for the hydro setup

http://www.coloradok5.com/forums/showthread.php?t=197055&highlight=hydro+conversion
 
hey randy. did you do a swap from auto trans to manual trans on your truck? if you did can you give me a list of the major components needed to complete this mod.

i am hoping to get all the parts this weekend and pull this thing apart.
 
general blaze said:
hey randy. did you do a swap from auto trans to manual trans on your truck? if you did can you give me a list of the major components needed to complete this mod.

i am hoping to get all the parts this weekend and pull this thing apart.
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Major components would be the pedals, transmission, and transfer. You can pretty much set up the linkages and stuff anytime after the fact

I'd look for a good 465 or 4500 or if you have time go look at that guys setup. It'd be worth 250 for the set. If you go that route look for a bellhousing, clutch fork, throwoutbearing and stuff like that.

You're also gonna need a clutch and pressure plate. Be prepared to spend some money cause you're gonna need to to get it where you won't have to pull it again anytime soon.

IMO i wouldn't start putting anything together until you have atleast those parts.

Like Russell said though you won't have to get a transfer if your transfer is a 32 spline unit and thr tranny you find is also.

all my stuff i took from a truck together pedals, tranny/transfer and all and swapped it right in. You might also look for maybe a donor truck...??

If i think of anything i'll post it up
 
i am not sure if i am ready to put all this together if i had a list of exaclty what i needed i am sure i could get it in there.

I found a guy in bakersfield that said he could rebuild my 700r4 for 1000$ its a pretty good deal but who knows how good his work is. i am guessing that would be the easiest way but i would love to have a manual trans in my truck.
 
if you are going to stick with an auto just find a used 700 for cheap or have yours rebuilt
 
general blaze said:
i am not sure if i am ready to put all this together if i had a list of exaclty what i needed i am sure i could get it in there.

I found a guy in bakersfield that said he could rebuild my 700r4 for 1000$ its a pretty good deal but who knows how good his work is. i am guessing that would be the easiest way but i would love to have a manual trans in my truck.
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WOW!! that's kinda high IMO Not sure but i paid $700 for my old one. Corvette servo and abunch of other goodies. Someone here knows where to get a tranny rebuilt for cheaper or the same price and have a damn good one. I just know they do

I say high cause if you pay it and it craps out you're screwed unless he has a warranty and you sign papers for it. My brother got screwed that way
 
where did you get yours done at? like i said i would prefer a manual trans but if i am going to save money and a lot of hard work to just get my 700 rebuilt i would just as well do that.
 
You're probably better off. I got mine done locally but the guy knew what he was doing also. Idk how long it held up cause i sold the truck but it worked while i had it.

IMO i'd stay with the 700r and get it rebuilt. Look around at shops though. Maybe ask some parts guys who they think might e good on stuff like that.

I just opted for the 4-speed cause i had it in my driveway. :D
 
Ok, sorry if I am repeating anything here, cause I didn't read all the replies after you posted up with the 465/205 combo pic...

1. Bolting an SM465 to your 6.2L is quick and easy. You can use the stock SM465 bellhousing with the 6.2L, it is identical to the gasoline version. You will need to install a pilot bushing into the end of your crank shaft (it is just pressed in, all 6.2L cranks are machined for it) and you will need to buy a proper flywheel for it. There are two types of flywheels available for a 6.2L, one for the two piece rear main seal, and one for the single piece rear main. Be careful if buying for a single piece main, as a 6.5L flywheel will bolt up, but is NOT the right one for your engine. A 6.2L has a balance weight on it, and if that weight is not present, you will cause serious damage to your crankshaft and or bearings.

2. That SM465 / 205 will bolt straight into your truck. Try and get the crossmember, and the driveshafts from the donor truck as well. The front shaft should pop straight in, but you'll need to have the rear's length changed to fit your truck. You want to have the driveshaft yolks to weld onto the ends of the new shaft.

3. Going hydro is easy, just swap the pedals in, drill three holes for the master cylinder, and run the line down. You'll need a hydro bellhousing for the SM465, as they are different from the older mechanical linkage bellhousings.

4. Make sure that your cab hump is un-boltable, and if you can, get the cab hump from the donor truck to swap onto your own. Otherwise be prepared to cut the old low hump off and swap on a high hump, then be prepared to cut holes in it for the shifters.

5. That 465 / 205 is probably an older 10 spline unit. You'll want to take it apart and take a look at the coupler between the transmission and transfercase. Make sure it isn't badly worn. Same goes with the input / output shafts of the t-case and transmission. If it is a 32 spline unit, jump all over it!

Other than that, I don't think that there is a whole lot else to tell you... Once you get into the thick of the swap, I'm sure things will pop up, but feel free to PM me, or post any time, I've done all the mods you are hoping to do in my own truck (auto to standard, 2wd to 4x4 here :) )
 
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