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STP oil treatment in trany
#1162344 04/26/2016 7:37 PM
Joined: Aug 2005
Posts: 71
USA
P
PAUL NOLZ
Offline
'Bolter
PAUL NOLZ
'Bolter
P Offline
Joined: Aug 2005
Posts: 71
USA
I just wanted to add the fact that this is a non synchromesh tranny ,How will STP work in a synchromesh tranny ? I'm not sure ,but if it takes 80/90 w oil I'm thinking it should work ok .Also in a standard rear end that has no posi clutch pack .

Hi guys I have a 1952 Chevy 1 ton panel truck with a 4 speed top loader tranny .
same tranny as a big bolt
Last week on the way back from a trip with my 1948 chevy 2 ton flatbed about 139 miles from my home something in the rearend went pop .

So the only way I had to go get it home was with my 52 1 ton panel and towbar .

But the 52 tranny is really trashed ,if you have it in any forward gear and it starts to roll backwards with the clutch in - it will try to lock up .

Well I got an idea to add a couple of bottles of STP oil treatment to the tranny to help it deal with towing the 2 ton back . .

All I can say is wow .After it got all mixed in good, the tranny really is a lot more quite now and shifted much better.So If STP works this well on a tranny that is this bad ,I'm sure it would work really well in a good trany .
I just poped the shifter out and poured it in through there , being so thick it was the only way to get it in the tranny .
Just wanted to share this .
Oh by the way the panel towed it ok but was on the limit .


Paul



Last edited by PAUL NOLZ; 04/27/2016 4:00 PM.
1948 Chevy 2 ton flatbed ex fire truck , and various motorcycles .
Re: STP oil treatment in trany
PAUL NOLZ #1162596 04/27/2016 8:41 PM
Joined: Oct 2013
Posts: 331
Bremond, Texas
M
mechanic58 Offline
Shop Shark
mechanic58
Shop Shark
M Offline
Joined: Oct 2013
Posts: 331
Bremond, Texas
Won't hurt a thing. I've done it plenty. It'll make the shifts a little smoother and might even quiet it down a tad. Try not to get it on your corduroy pants though.

The best easy way to get it in is to heat it up first. When it used to come in a cardboard can with a metal bottom on it you could put it in a pot and sit it on a stovetop and heat it up to 250* and it would pour like water. Now that it comes in plastic bottles I reckon you'd have to put it in a pot full of water and bring it close to a boil to get it warm enough.

1950 4100 - unrestored and driven weekly for almost no reason at all.
Re: STP oil treatment in trany
PAUL NOLZ #1162682 04/28/2016 4:36 AM
Joined: Jun 2011
Posts: 5,096
Longmont, CO
E
EdPruss Offline
Crusing in the Passing Lane
EdPruss
Crusing in the Passing Lane
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Joined: Jun 2011
Posts: 5,096
Longmont, CO
Or put in the microwave when woman of house is out shopping.

Ed

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.

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