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Gas\Diesel Engine & Transmission:

engine/transmission interchange?



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Old 08-26-2012, 01:26 PM   #1
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engine/transmission interchange?

hey yall, i know its been a while since ive been on, had alot goin on lately and no internet to stay up to date either...

anyway, ive got a grocery list of things to fix on my 92 k1500, one of the problems id like to address is swap the gutless v6 for a v8, but im coming up with some issues that im not sure if itll end up a bigger head ache than planned...

1st question - nv3500 5spd, did they make a v6 version and a v8 version with a bigger bellhousing? cuz frm my research the v6 clutch and v8 clutch are different sizes so idk iff ill run into bellhousing clearance issues with the bigger v8 clutch, and i know for a fact that a nv3500 in a 4x4 s10 is not the same as a nv3500 in a fullsize (case is different, but almost identical) so idk if the 5spd behind a v6 and v8 in a fullsize are different aswell

2nd question - ive talked to various transmission shops about whether or not the 5spd will hold up to a v8 power, and so far ive come up with itll handle a stock tbi 350, but a built v8 will probly trash the tranny... does any1 have some info or 2cents they wanna add to that?

3rd question - id like to either go 350 tbi, or if i can swing the finances id like to go a built 383 tbi... so i would imagine if i go 383, id have to swap my nv3500 for a nv4500... how easy of a swap is swapin a 3500 for a 4500?
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Old 08-27-2012, 11:12 AM   #2
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The 3500's are junk. Even when they have minor issues, you will NEVER want to build one at camp stone cold sober!! They suck to build. They are pretty weak and mainly have bearing issues because they leak like a son-b.

The 4500 is stronger but also a boat anchor. Can easily be built at camp if you break. They have weak 3rd gear synchros and after some real man wheeling will start grinding. Plus they like to break 5th gear forks if you haul a load of horses on a gooseneck in the middle of new Mexico :-)

If your gonna run some serious balls in front of it, I would run the 4500 if I got it free but I think a lot of these guys like the sm465.
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Old 08-27-2012, 11:22 AM   #3
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i had a sm465 in my 82, and i loved it... its damn near bullet proof, i just didnt like not havin overdrive

ive done a bunch of readin and cross referencing, and online searching and from what i understand im thinking the 4500 swap should be pretty close to a direct bolt in otherr than moving the trans cross member and driveshaft lengths
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Last edited by 82 chevy outlaw; 08-27-2012 at 11:39 AM..
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Old 08-30-2012, 02:00 PM   #4
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okay, i did some more checkin around and even called the junk yard i got the trans from, and aparently my trans was pulled from a v8 truck, so that answers that question

i also decided that for now ill just swap in a tbi350 and kinda fix other things as i go along but...

did a lil more research and found that the estimated torque rating on my 5spd is about 300 ft lbs... the 350 i plan on building will be a vortec long block with a tbi intake... from what i read, tbi's were rated at 210hp/300 ft lbs and the vortec is rated at 250-290hp/330 ft lbs... i want the vortec long block cuz they made more power, had a higher comp. ratio, and also more fuel efficiant... tbi's always nvr really were a power house and im lookin for a lil bit of power...

so am i gna be looking at transmission issues if i swap in the vortec tbi?
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Old 10-24-2012, 10:56 AM   #5
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You could use the SM465 and then add the Ranger OD unit between the transmission and the bell. This way you get a strong tranny, and the Ranger OD is rated, (per Advannce Adapters web page) @ 420 ft lbs input, and a GVW of 25,000 lbs. they cost like $1300 The OD is a 27% unit, and whats better, it acts as a splitter, and with the 4 speed you now have 8 speeds.

Last edited by 67jeep; 10-24-2012 at 11:05 AM..
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Old 10-24-2012, 11:09 AM   #6
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The only thing about using the Ranger is I personally have not used it, so I have no experience with them. If anyone has used them, please post something about them.
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Old 10-25-2012, 11:24 PM   #7
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The nv3500 is in no way the great but I have a RCSB 05 GMC with a 4.8 and nv3500 that put down 317hp and besides sticky shifting I have had no issues with my trans
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