TH350 problems - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cochran63 · 08-01-2004, 10:02 PM

About a month ago i put a pretty healthy 327 into my 85 swb with 2.73 gears. After about 50 miles of driving the 2nd gear sprag busted. I pulled the tranny and took it to the local shop and had it rebuilt. I had a hardened sprag put into it at that time. I put it back in and after 250 miles it busted the sprag again. Anybody else ever had this problem? What would be causing it? Thanks, Derek

SanitysBane · 08-01-2004, 11:45 PM

not putting the sprag in correctly, if can only go in one way, thats the way it is in the 700R4, just my worthless under the couch .02

cochran63 · 08-02-2004, 10:17 PM

The first transmission was nearly 10 years old and it worked great with the 305 but 50 miles with the 327 killed it. It is just that good GM feeling.

plumbcut · 08-03-2004, 12:44 AM

its gods way of telling you to upgrade to a built th400 or 700r4

MylilBowTie · 08-03-2004, 02:06 AM

The "gods" already had a talk with me lol. Thats why I now have a th400 vs the weeeeaaak th350 I had. Those are some of the parts the repeatedly broke on a daily basis. I wasn't easy on it but I didn't neutral drop it or anything like that. I had nothing but trouble out of it, it was in the shop more that I got to drive it. Rebuilt and band-aided 10 times at least in 5 months and I only drove it about a week out of the 5 months.

Not that this post helps you fix it any, but this has been my experience with them.

08-01-2004, 10:02 PM	#1
cochran63 Registered User Join Date: Jan 2004 Location: Oklahoma Posts: 1,057	TH350 problems About a month ago i put a pretty healthy 327 into my 85 swb with 2.73 gears. After about 50 miles of driving the 2nd gear sprag busted. I pulled the tranny and took it to the local shop and had it rebuilt. I had a hardened sprag put into it at that time. I put it back in and after 250 miles it busted the sprag again. Anybody else ever had this problem? What would be causing it? Thanks, Derek __________________ Youth soon passes away, but immaturity can last a life time.

08-01-2004, 11:45 PM	#2
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	not putting the sprag in correctly, if can only go in one way, thats the way it is in the 700R4, just my worthless under the couch .02 __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

08-02-2004, 10:17 PM	#3
cochran63 Registered User Join Date: Jan 2004 Location: Oklahoma Posts: 1,057	tranny The first transmission was nearly 10 years old and it worked great with the 305 but 50 miles with the 327 killed it. It is just that good GM feeling. __________________ Youth soon passes away, but immaturity can last a life time.

08-03-2004, 02:06 AM	#5
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	The "gods" already had a talk with me lol. Thats why I now have a th400 vs the weeeeaaak th350 I had. Those are some of the parts the repeatedly broke on a daily basis. I wasn't easy on it but I didn't neutral drop it or anything like that. I had nothing but trouble out of it, it was in the shop more that I got to drive it. Rebuilt and band-aided 10 times at least in 5 months and I only drove it about a week out of the 5 months. Not that this post helps you fix it any, but this has been my experience with them. __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI Last edited by MylilBowTie; 08-03-2004 at 02:15 AM.

08-03-2004, 12:44 AM	#4
plumbcut california fill Join Date: Apr 2004 Location: Sunny So-Cal Posts: 694	its gods way of telling you to upgrade to a built th400 or 700r4



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