I finally got a few pictures... Here they are... I've got a few more I'll post in a bit.

Enjoy! I certainly am... :D



Let me know if the pictures don't show up... I can't see them, but I am sure that is my old dialup rig acting up on me.

I can't see them either and I'm on DSL. :mad:

I edited my first post and attached the pics instead of putting them in the post... Should be working now, even I can look at them... :eek:

any transmission pics and the bell housing?

Yeah, I've got a pic of the 5 speed sitting next to a 700R4. I didn't take a lot of pics while I was doing the swap because my camera wasn't working right.

I'll see about that pic and edit this post to include it...

im thinking about doing the same thing :P

Here's the pic... Sorry it's a little poor, but I took it at night (midnight to be exact) and I had to lighten it so you could see it at all.

By the way, I would very much recommend this swap. It is cheap, easy, quick, and very rewarding when you are done...

you used the 9" clutch correct? any idea what it would take to get a larger clutch to fit? or should it just bolt up. also curious how well it holds up to your 6.2, have you done a turbo setup or stock engine power?

Actually, I ended up with an 11" clutch. It bolted right on to the 6.2 flywheel without issue. I believe the factory 6.2 trucks had a 12" clutch.

I don't have any problems with clutch slippage. It holds very solidly. It does generate a bit of pedal pressure, maybe a hair more than I'd like.

The tranny seems plenty strong.

Everything seems to hold up quite nicely to my 6.2. It is pretty close to stock... No turbo, just a turned up IP.

I guess I should put my sig and avatar back the way they were that way people can tell what my truck is... ):h

Hey,

What tranny did you use?

I used a 5 speed out of an S-10. It has been identified as an NV3500. I didn't know that, several people on my other thread identified it for me.

I know, it isn't the strongest one, but I wanted a manual tranny with an overdrive and I don't have the money for an NV4500.

nice install good price from what i read in your post:cool2:

looks good.

Thanks!

That is awsome High Sierra 2500. Do you think it Could be possible to mount the np3500 in a 4x4? Does anyone make an adaptor for the NP3500 to a 208 case? or any for that matter?

Andrew

Welcome to the forum!

I'm sure it is possible. I've come up with some new information, though, and that may not be the tranny I've installed here...

I was talking to some guys at one of the junkyards around here, and apparently the tranny isn't out of an S-10. It's apparently out of a fullsize pickup. Evidently someone must have put a different transmission in the S-10, or that isn't really what the trans came out of at the other scrapyard... i never did see the tranny in a truck, come to think of it.

I'm going to have to find out for sure what tranny this is!

you make me think now I junked a astro van with a 4.3 5 speed mmmm I already got the flywheel:ro) :ro) :ro) got to tell use how much improvement of gas milage..

I doubt my mileage will improve. The 700R4 I had really couldn't be beat for gas mileage.

The five speed is the only way to go. I wouldn't have a tranny without overdrive knowing that I could have this.

but in all the cars I drove a 5 speed always seemed to get better milage...I guess it really matter what the 5th gear ratio is compared to the od in the automatic... I'm looking at a blazer with no tranny thinking of what I can stick the 6.2 5 speed combo in some scary thoughts here:eek: :eek:

hmmm, i guess im going to have to go to the local pick and pulls and see what they got. You are definatly an inspiration to us all HS2500.:grd:

From just eyeballing your tranny it looks like it is a 3500 but im only %80 sure on that. Do you have any more pics of the tranny out of the truck?

i allways take my hat off to someone who thinks outside the box and does what others tell you that you cannot. good job , hope it all works out for you!!

Thanks! :)

but in all the cars I drove a 5 speed always seemed to get better milage...I guess it really matter what the 5th gear ratio is compared to the od in the automatic... I'm looking at a blazer with no tranny thinking of what I can stick the 6.2 5 speed combo in some scary thoughts here:eek: :eek:

They both have about a .73 ratio. The reason you get better mileage out of the 5 speed is because less power is used to transfer the power. AT's use engine power to pump fluid, engage clutch packs, exc. TH400's eat up a LOT of power internally. 700r4's aren't as bad.

If you'll notice, a car might be rated at 300hp (engine), but only put down 250hp to the rear wheels. That loss is from the drivetrain. Same car with a 5 speed will put down several more HP.

Also don't forget the fact that the acutal work the engine is having to do is less with a 5 speed. As it has more gear options to select from. (IE drop the MT down to 3rd, whereas the AT would hit 2nd)

Hi ,
the tr700R4 will pull 35 hp from your engine.

The manual trans will only pull 15 hp from the engine

Estimate : gain 20 hp whitout any engine work , good update

and maybe 1 mpg gained;)




Ed

Hmmm... 20 more hp... I'm going to have to look into this. :D

I knew about the horsepower loss, but I honestly forgot about it entirely after I installed the tranny. I'll have to investigate a bit. ):h

Hi , that's the number i get at the dyno ,

when i swap a Powerglide trans for a th700R4 into my friend Chevelle 300 SS .

He loose 20 hp but he dont care he have many many more just in case.

Yeah, those guys with the Chevelles tend to make sure they have plenty of extra power to cover up any losses... :eek: :cool2:

Seems to me the powerglide is an automatic as well, though... I would think that would eat some horsepower, although not as much as the 700R4...

http://i68.photobucket.com/albums/i29/tigman_photos/Photo023.jpgNo the guy at the dyno tell me that; the powerglide pull exactly the same amount as a manual trans, around 15 hp

Interesting.

Neat Chevelle, by the way...

Yep a powerglide uses the least amount of HP of all AT's. Mainly due to only having two gears. There's a lot less stuff going on inside them to suck the power down.

Hi. New here.. Nice work on the transplant.;)

Iv got a 91 K2500 fleetside 4x4 with the 6.2, fith wheel hitch. It will pull about anything at 75 mph. But thats about top speed because of the manual 4 speeds pulling ratio it came with stock. I think its the ( prolly wrong) RPO M20.?

The gas mileage is low because of the ratio and Iv been searching around looking for the fith gear this truck desperately needs on the highway when its not pulling. I can shift into forth gear at 35mph.:eek: I need a manual overdrive gear.

Are you now sure you have the NV3500 you spoke of High Sierra? Im wondering if the NV4500 is what Im looking for. I have a sevice manual which states the truck could have come with a 5 speed 85 mm RPO MG5 or a 5 speed 109 mm RPO MT8.

All this is greek to me because Im a Heating and Air guy. Can anyone tell me what might work so I can approach my mechanic with some knowledge? And are different fith gear ratios available?

Thanks

if the 700r4 eats 35 hp and the TH400 is worse, how much does a TH400 eat?

Hi. New here.. Nice work on the transplant.

Iv got a 91 K2500 fleetside 4x4 with the 6.2, fith wheel hitch. It will pull about anything at 75 mph. But thats about top speed because of the manual 4 speeds pulling ratio it came with stock. I think its the ( prolly wrong) RPO M20.?

The gas mileage is low because of the ratio and Iv been searching around looking for the fith gear this truck desperately needs on the highway when its not pulling. I can shift into forth gear at 35mph. I need a manual overdrive gear.

Are you now sure you have the NV3500 you spoke of High Sierra? Im wondering if the NV4500 is what Im looking for. I have a sevice manual which states the truck could have come with a 5 speed 85 mm RPO MG5 or a 5 speed 109 mm RPO MT8.

All this is greek to me because Im a Heating and Air guy. Can anyone tell me what might work so I can approach my mechanic with some knowledge? And are different fith gear ratios available?

Thanks


Welcome to the forum! :welcome2:

I believe RPO code M20 is the four speed with granny first, but I can't say that for certain.

I can shift into any gear at about 30... That is normal. These engines have a wide enough powerband to cover up early shifts.

I am not sure what tranny I have yet... Still researching that. I'm also starting to wonder if it really has an overdrive... Sounds a bit louder now, like the engine is revving higher, but seeing as it will still go just as fast as I want without sounding like it's going to blow up, I think the extra noise is due to the fact that I removed a little sound deadening.

The NV4500 is really the best thing. It is bulletproof. The only downside is that buying one plus the clutch, flywheel, etc., could cost close to $1000. The total cost for my swap was $328.00. :D

I think the MG5 or MG8 may be what I have... That is the late model (1990's) transmission, as they didn't put those in trucks with the '80s body style as far as I know, and it seems that my tranny originally came out of a mid '90s fullsize pickup...

I'm going to do some research on it and see if I can figure out what exactly it is. I kind of forgot that I didn't know what tranny it was, I've been having so much fun driving it... :D

Hope this helps!

if the 700r4 eats 35 hp and the TH400 is worse, how much does a TH400 eat?


Probably quite a bit... Possibly 40-50 hp... :eek:

Thanks.

What I really want is a fith gear I 'cant' shift into until 45 or 50 mph. I bet I could almost double my gas milage if I had that. Since this was a hand me down truck , I could deal with the $1000. But Im not in any hurry and can search. But I need to know exactly what for..;)

do you tow alot or offroad? if your fairly hard on your truck and want to still have overdrive i'd go for the nv4500 or nv5600. like high sierra said the 4500 is a bulletproof tranny, and the 5600 is even more. your not likely to find a tranny that you cant shift into od at around 35-40mph, unless you find a 6 speed manual from a duramax and put that in your truck.

Yeah, you'll be able to put just about anything in there and be able to get in the top gear at 35... You'll be out of the engines powerband, but it will pull through it.

Still researching... Not sure yet what I've got...

In my 03 I was able to run 6th from 30 all the way on up. It didn't pull very well going 30 mph, I think a snail might have been able to out-accelerate me, but hell, it beat downshifting at the time!

I dunno how it'd work with a 6.2, I've never driven one.

Interestingly enough, it works about the same... It will pull me from just about any speed all the way up in the top gear. And yeah, it takes a while.

The other cool thing is that I can start off in third gear without touching the gas... :D Of course, it does work the clutch a little bit, so I don't start in third most of the time...

Great job on the conversion, But the pedals are kinds distorted looking.Any plans to get that straightened out?

Yeah, I'm going to get that fixed pretty soon. The clutch pedal just isn't quite right and it is bent anyway. I plan to cut it and take a wedge out of it so that it drops down a bit and then straighten it out a bit. Shouldn't be too hard to do and then I think it will look just about factory.

It is functional this way. I've been meaning to fix it, I just haven't had time to do it yet.

Sorry to drag up kind of an old thread, but I got the tranny identified... It's an NV3500. Took it to a tranny shop (finally found one that knows what they are talking about) and they identified it for me.

Good thing I finally found a shop that knows what they're doing... The other place started the rumor that it was something else and they couldn't tell me what... :rolleyes:

The 3500 will work as long as you don't tow with it too much or really hammer on it (burnouts might be a bad idea). But it's a decent tranny.

Exactly my thoughts on the matter. :)