A couple of questions. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

eightbanger · 06-23-2008, 07:41 AM

What Transmision fluid should I be putting in my T400? it needs refilling after a gasket change and when I went to buy some they had Dexron 2 Dexron 3 and a few others.

I need to buy a Tap & Die set and need to know what thread type was used on these Trucks, the only thing I know is they're not Metric.

I have seen something called UNF/BSP would these be correct?.

Thanks guys.

Wrenchbender Ret · 06-23-2008, 08:44 AM

Use Dexron III fluid. The threads on that trans are SAE which is the fine threads & USS which are coarse threads. Any non-metric tap-die set should have these.

eightbanger · 06-23-2008, 11:16 AM

Thanks very much Wrenchbender for the info...I guess you realized I was asking about Tap & Die sets cause I had managed to strip the thread on one of the holes on the Trans. So just to be clear on the threads, on the trans they are fine SAE, and the rest of the truck they are coarse USS?

06-23-2008, 07:41 AM	#1
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	A couple of questions. What Transmision fluid should I be putting in my T400? it needs refilling after a gasket change and when I went to buy some they had Dexron 2 Dexron 3 and a few others. I need to buy a Tap & Die set and need to know what thread type was used on these Trucks, the only thing I know is they're not Metric. I have seen something called UNF/BSP would these be correct?. Thanks guys. __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger Last edited by eightbanger; 06-23-2008 at 08:25 AM. Reason: spelling

06-23-2008, 08:44 AM	#2
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,229	Re: A couple of questions. Use Dexron III fluid. The threads on that trans are SAE which is the fine threads & USS which are coarse threads. Any non-metric tap-die set should have these.

06-23-2008, 11:16 AM	#3
eightbanger 454 MAKES IT ROAR Join Date: Jan 2008 Location: Essex, U.K Posts: 2,701	Re: A couple of questions. Thanks very much Wrenchbender for the info...I guess you realized I was asking about Tap & Die sets cause I had managed to strip the thread on one of the holes on the Trans. So just to be clear on the threads, on the trans they are fine SAE, and the rest of the truck they are coarse USS? __________________ Nigel. An American living in a British body. 1971 Chevy Cheyenne 10 454 "In a time of universal deceit, telling the truth becomes a revolutionary act." - George Orwell "When injustice becomes law, resistance becomes duty" - Thomas Jefferson No more pain. 03.12.60 -- 12.28.10 http://www.youtube.com/Eightbanger



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