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05-09-2015, 09:20 PM
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#1 |
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Registered User
Join Date: Feb 2014
Location: Urbana Illinois
Posts: 55
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Transmission pan bolts
I put on a new transmission pan and and one of the bolts by the cross member wont tighten up because it appears to be stripped inside. Do I re tap it and if so what size tap and bolt to put in there? Also, it seem pretty hard getting that flywheel cover back on because of the radiator cooler lines, any tips on that? Thanks, Al
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05-11-2015, 11:15 PM
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#2 |
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Senior Member
 
Join Date: Jul 2000
Location: North Texas
Posts: 3,563
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Re: Transmission pan bolts
The proper way to fix the stripped thread is to use a thread repair kit, like Helicoil. It will come with a special tap, several thread inserts, and an insertion tool. You will need a 21/64" drill. Once you're done, the threads will outlast you! I had to install 4 of them on a used TH350 I bought last year.
Just about any auto parts store will have kits made by Helicoil or another manufacturer. Your pan bolt size is 5/16-18, aka 5/16 UNC. You can probably find a "how-to" video on YouTube. 
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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05-12-2015, 07:58 AM
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#3 |
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,563
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Re: Transmission pan bolts
I just remembered this: If your damaged pan bolt hole is a "thru-hole", you could use a longer 5/16-18 bolt with a nut & washer on the top. Not as clean as using a HeliCoil, but it would work.
__________________
Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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05-12-2015, 10:37 PM
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#4 |
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Registered User
Join Date: Feb 2014
Location: Urbana Illinois
Posts: 55
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Re: Transmission pan bolts
Thank you all very much, Al
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05-27-2015, 10:06 PM
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#5 |
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Registered User
Join Date: Feb 2014
Location: Urbana Illinois
Posts: 55
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Re: Transmission pan bolts
Thank you MikeB! I bought the kit and it worked like a glove! Al
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