Hot Rods GM NV3500 in 350 Flywheel and Clutch Questions

Hey everyone I'm working on final assembly of my 34 Ford Pickup with a GM 350/357 crate engine and an NV3500 transmission. I had a trans in the truck for mockup for years and when I went to have it freshened up it turned out to be an old HM290 version which is known for front bearing failure and a few other things. I believe I was lucky enough to find a brand new GM built NV3500 that's the later style with the hydraulic throwout bearing internally. I'm trying to figure out what the proper flywheel and clutch will be for my combo. The crate engine has a one piece rear main seal and the trans I ordered was spec'd out for an 06 Chevy Silverado with the 4.8L engine....GM part number 12572824. I know the trans isn't rated to handle 350 hp and 400 ft/lbs of torque but it won't be raced or clutch dumped and with skinnies in the rear of a light truck I'm hoping it'll survive for many years of local cruising.
Can anyone who's run the later style NV3500 behind a one piece rear main seal engine point me in the right direction for a flywheel and clutch setup? I did order the factory 06 throwout assembly and will plumb that to my Wilwood master cylinder once I have it here to see what type of fittings I may need.
Thanks in advance.

 

I think you are at the wrong site for that nontradional drivetrain.

 

Problem is that you should be looking for one for a 96 rather than an O6 unless you have one of those funny looking engines that doesn't have a distributor.
This says 91 to 05 for the NV3500 that has a rep for being a pretty wimpy trans.
NV3500 HM290 Manual Transmissions - Midwest Transmission Center, Inc.

Rock auto should show everything as far as part numbers that you can even use locally if you indeed have a 350 with a one piece rear seal and not an off topic engine.
Flywheel 1995 CHEVROLET C1500 PICKUP 5.7L V8 Flywheel | RockAuto
Clutch kit 1995 CHEVROLET C1500 PICKUP 5.7L V8 Clutch Kit | RockAuto

Now are you positive of what you are actually working on and looking for or are you just assuming?

 

But a T-5's ok, right...
The NV 3500's all came behind one piece rear main seal engine's. The one's I've messed with all had the standard 1-1/8" x 10 spline input shaft. Get a flywheel with the correct balance for your engine and a clutch kit for whatever the trans came in originally, and you should be in good shape.

 

I think he was a few years off on the year of truck he was trying to use to hunt parts with. 88/96 work, if he has the engine he says he has. Don't work if he has the engine that fits the year model of truck he mentioned. Rock Auto doesn't show that truck as having a stick.

 

I had one of the later versions in a 55 chevy, it worked great. My buddies have used them behind some snotty motors with no breakage. Like has been said use the large diameter flywheel for your motor and the corresponding disc and plate. I’ve got an earlier version i plan to run in my hemi powered plymouyth. There was an outfit called core shifters that made improved shifters for them you might want to look them up.

 

I used a NV3500 bell housing and a T-5 transmission on my 327 engine, it works great.

 

Pic's please...

 

Uh, every NV3500 I have seen has an integral bell housing.

 

Thanks for the replies....hoping I didn't order the wrong trans. It states it's an NV3500 for 99-07. Does that have a different bellhousing pattern than a traditional small block?

 

I went based off of this application chart when I ordered. I thought the earlier versions had the slave cylinder and the 99-06 have the internal setup but the rest was the same.

 

V8 pattern has not changed. Some have an extra bolt at the peak, an some are missing a bolt at the 1 o'clock position.

Stuff got a little weird in the LS era, but the basic pattern is the same.

Over-the-counter replacement transmissions, if I remember correctly, have all the bolt holes, so they can have one part fit everything.

 

Thanks for the clarification. I knew the HM290 bolted right up as I used it for mockup and I was almost positive the only difference in the case with the later NV3500 was the holes in the bellhousong for the hydraulic lines. I've been waiting over a month but supposedly the trans is shipping Monday so hopefully it all works out. Like I said I know it's not rated for the power of this crate engine but I don't plan to beat on it. And the tires and light rear end will still be the weakest point. If it does grenade down the road I have access to the equipment for cryo treating and I can attempt to beef it up.

After 8 years of fab and acquiring parts I can finally see the light at the end of the tunnel. Chassis with all steering, suspension, and brakes are all done. Engine is painted and intake is on. Waiting for dress up items to finish it off and I can put the driveline in and focus on painting the cab and bed next.

 

Scotty what's the reasoning for the larger flywheel versus the smaller diameter? I'm assuming it's better at handling the balance aspect? Also the larger clutch offers more clamping potential?

 

Larger clutch was my reasoning

 

last year of S10 production was 2003... Hopefully the trans is not the NV 1500 used with the 4 cylinder engines...
I had two S10 4.3 5 speeds with the NV3500... even with a 3.08 rear gear the 4.03 first gear was too low for performance use. Some of the NV3500 used by Dodge has a slightly better but still low 3.5 first...

 

93 to 95 Chevy trucks had separate bell housings with a standard transmission bolt pattern

 

https://en.wikipedia.org/wiki/New_Venture_Gear_3500_transmission

 

Definitely a 3500 out of a 1500 pickup. The part number is the same from 99-07 from what I found. As far as gearing i know 1st may be a bit of a granny....can always start in 2nd if it's that bad.

 

The NV4500's had separate bellhousings, not the 3500's.

 

Send the rod-ster a msg he use a NV3500 in 40 ford PU he will tell you what you need

 

I believe that's a NV4500.

 

I can't seem to find him listed as a member

 

My mistake I used a NV4500 bell housing.

 

The NV4500 was in the 3/4 and 1 ton. The 3500 was 1500s and s10s. Also available in Rams and dakotas with a dodge bolt pattern. FYI if using a junkyard one.

 

Well, what’s 1st gear like in these and what’s the OD ratio? Are the gear splits good?

 

Ok so after doing extensive research the last few days I'm getting a bit closer. I believe I'll be ordering GM PN# 14088648 flywheel...it's for a one piece rear main seal block, 14" diameter, 168 tooth. It states this requires a clutch with a diameter of 11.0" or 11.85". This is where I'm still hung up a bit. Does anyone who's used an NV3500 have a definite stock application I can look up to source the appropriate clutch?
By the way this is all still speculative because I ordered the trans a month ago and it still hasn't shipped.....

 

94 Chevy K1500 w/5.7 will get you where you need to be.

 

Thanks....talked to Midwest Transmissions this afternoon and they basically gave me the same info so thats what I'll be using if I get the trans

 

Could have been me.. The Rod-ster
Try that