Th 350
Thread Starter
NCM Grand Opening Veteran
Joined: Sep 2005
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From: South of giving a damn
St. Jude Donor '11, '17
Th 350
2 part question.
1. 383 450-500HP engine, same torque, 3.55 rear gear. Will the TH350 handle this much or do I need a 2004r? Not a question about overdrive, I know those arguments.
2. If the TH350 will handle it, can I rebuild it myself or would I have a fool for a customer?
1. 383 450-500HP engine, same torque, 3.55 rear gear. Will the TH350 handle this much or do I need a 2004r? Not a question about overdrive, I know those arguments.
2. If the TH350 will handle it, can I rebuild it myself or would I have a fool for a customer?
Instructor
Joined: Jul 2004
Posts: 245
Likes: 0
Originally Posted by MR L88
If built correctly the 350 will easily handle the HP.I had mine done in 2004,built to handle 900 hp,I have had zero problems in two seasons of drag racing.
Thanks,
Jeff
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by ratflinger
2 part question.
2. If the TH350 will handle it, can I rebuild it myself or would I have a fool for a customer?
2. If the TH350 will handle it, can I rebuild it myself or would I have a fool for a customer?
well if you want to rebuild yours i will contemplate rebuilding mine at the same time...at least we will have two people trying it.....what do the parts cost???
edit you know i think i have book on rebuilding this let me go look and see what we are contemplating.....i never did understand fluid dynamics and pressure.....
Last edited by bobs77vet; Jan 31, 2006 at 03:53 AM.
Thread Starter
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Joined: Sep 2005
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From: South of giving a damn
St. Jude Donor '11, '17
bobs77vette,
It will be the fall before I tackle this (If I do). A high perf kit from one place was $250. The special tools could easily be as much. After all that I'd be getting close to what a tranny guy offered (tranny only, I remove & install tranny).
It will be the fall before I tackle this (If I do). A high perf kit from one place was $250. The special tools could easily be as much. After all that I'd be getting close to what a tranny guy offered (tranny only, I remove & install tranny).
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
I watched a video on rebuilding a 350 and they guy filled up two big plastic tubs with internal parts. At that point I decided there was too much that could go wrong and I didn't want to pull, rebuild, install and have to do it all over again if I made one simple mistake. Not worth it for the 450.00 shops charge to build a decent transmission (clutches, HD sprag, etc). Putting the TRANSGO shift kit in this weekend was enough for me.........
You guys are brave....
You guys are brave....
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
$250 for parts....my trans guy said he would charge 350-400 to do the job if i brought him my trans....which incidentally is working ok as it is.....
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Racer
Joined: Sep 2004
Posts: 482
Likes: 1
From: Brandon Manitoba
This is a road I will come to in the future and It posed a few spin off questions for me. For "ratflinger" I do not know what year your car is but I have an '80 and I have been told I will also need to change my torque converter out to a different stall speed. Being my car is an 80 it has a lock up converter so I do not know how that effects the changes. Secondly for " Hvymtlc5 " I have the B&M shift kit sitting on my bench and have been contemplating that install . Could you say how the install went and were the results worth the effort. Brent
Melting Slicks
Joined: Mar 2004
Posts: 3,472
Likes: 18
From: Lake Ozark, MO
Secondly for " Hvymtlc5 " I have the B&M shift kit sitting on my bench and have been contemplating that install . Could you say how the install went and were the results worth the effort.
...so everything was straight forward. I just brought my portable vcr out to the garage and followed it step by step..if I didn't understand something I just reveresed and watched it again. Very impressed with their hardware...everything you need was included (pan gasket too). Hardest part was working on my back with the valve body. Haven't road tested, because it is still up on the jacks for the brakes...I have used the B&M kit in the past (way in the past... on a 70 Cuda). It was very docile on the shifts until the car was floored. It would bark the tires on the 1 to 2 shift no problem.
Mike
Instructor
Joined: Apr 2004
Posts: 137
Likes: 0
From: Princeton MN
350
Originally Posted by 406shark
If you don't mind me asking...who built it for you and how much did it run? It would be nice to find someone local that I can trust to do it right the first time.
Thanks,
Jeff
Thanks,
Jeff
Melting Slicks
Joined: Jun 2003
Posts: 2,802
Likes: 241
From: Niles, MI
I rebuilt a lot of TH350s about 30 years ago. I was a line tech at a Chevy dealer and did all the work on the automatics. Cleanliness is important. A little piece of lint in the valve body can result in big problems.
I'm not sure if I would try rebuilding one at home. 30 years ago I had the advantage of having all the special tools (trans stand, pump slide hammers, seal and bushing installers and clutch spring compressors), but I suppose it could be done
I'm not sure if I would try rebuilding one at home. 30 years ago I had the advantage of having all the special tools (trans stand, pump slide hammers, seal and bushing installers and clutch spring compressors), but I suppose it could be done
Thread Starter
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
bobs77vette, that's about what my trans guy quoted. I think I'll pass on this 'learning' experience. Mainly I was interested in how much HP the tranny would handle, seems that isn't a problem. Mine's leaking fluid like a sieve, but the engine/tranny rebuild has to wait until fall, so I'll just keep the fluid levels up until then. It's only a weekend river anyway.
bams12, mine is a 79 & yes I will be going to a 2400-2800 stall converter when the engine is rebuilt. Years ago I installed a shift kit in my Z-28. It wasn't difficult and the shifts crisper, but not harsh.
bams12, mine is a 79 & yes I will be going to a 2400-2800 stall converter when the engine is rebuilt. Years ago I installed a shift kit in my Z-28. It wasn't difficult and the shifts crisper, but not harsh.