4 speed oil

[69'Net]

Everyone says to run sae 90 gl4 in their 4 speeds. I cany source this locally anywhere, i cant even find it onlune. Closest thing I can find on the shelf is valvoline 80-90. The back of the bottle says gl5 and gl4. Can I run this

 

[toolmanmike]

Not a Pennzoil fan but this stuff does work well.

 

[R413]

Not a Pennzoil fan but this stuff does work well.

View attachment 1650773

This yellow bottle is ATF based and not to be used in an old 4 speed.

 

[toolmanmike]

This yellow bottle is ATF based and not to be used in an old 4 speed.

 

[toolmanmike]

Read the label before buying! It has been a few years since I bought any. Back then there wasn't any ATF based lube. Thanks for the clarification.

 

[R413]

Brewers says use this sta-lube SL-24239.
Brewers is a vendor that specializes in mopar 4 speeds.

 

[Jerry Hall]

Advance Auto Parts - Down for Maintenance

 

[RJRENTON]

Try Passon Performance
Passon Performance
309 Turkey Path, Sugarloaf, PA 18249
570.401.8949
Great web site.....www.passonperformance.com
They manufacturer MOPAR transmissions and parts. Call them and inquire what they recommend,
BTW....mashed bananas and peels are quite slippery and promote quick shifting......
I use synthetic Mobil one 75w-90 gear oil and have for 35 years, in spite of what others use, or think.....use the FSM for MOPAR's recommendation.
BOB RENTON

 

[Cranky]

IF you live in a cold area.....heavy oil may not like being used.....

 

[Jerry Hall]

I use 80W90 myself, but 90W is available.

 

[69'Net]

Thanks for the replies. I did find gl4 straight 140? I live in south Texas, its hot

 

[69'Net]

Brewers says use this sta-lube SL-24239.
Brewers is a vendor that specializes in mopar 4 speeds.

View attachment 1650783

I may order that, but I was hoping to find something off the shelf though

 

[PRND21]

Thanks for the replies. I did find gl4 straight 140? I live in south Texas, its hot

Where, may I ask? I can’t find straight 140 around here.

 

[RJRENTON]

Where, may I ask? I can’t find straight 140 around here.

Try calling the oil companies or do a google search in your area. Synthetic's.have a broader temperature range snd viscosity index. Compare the SSU index. IMO.....stay away from 140 grade too thick to circulate thru the needle bearings.....but its up to you....
BOB RENTON

 

[Ron_M]

Second endorsement for the oil Jamie Passon sells.

 

[Bird 426]

O'Reilly Auto carries the Pennzoil Syncromesh.

 

[PRND21]

Try calling the oil companies or do a google search in your area. Synthetic's.have a broader temperature range snd viscosity index. Compare the SSU index. IMO.....stay away from 140 grade too thick to circulate thru the needle bearings.....but its up to you....
BOB RENTON

Thanks for the reply. Not wanting to highjack this thread. I used to buy it from my fuel/oil supplier, I use it in a couple of bush hog gearboxes. I’d never use it in a transmission. All I can find anymore is 85W/140.

 

[Krooser]

A transmission doesn't need hypoid gear lube like 80w90 etc. because a trans does not receive the shock loads like a R&P receives. But it does work...

According to my dealer experience ('68-'72) 833's came with type B ATF.

Cars run in high temps can use 80w90.

GM Syncromesh fluid is about 50W and is a good all around lube. All GM Syncromesh fluid , regardless of brand, is made by Mobil.

GL5 lubes like to eat yellow metals like blocking rings.

 

[hunt2elk]

PennGrade 1® Classic GL-4 Gear Oil SAE 80W-90 - Gear Lubricants
Any of you guys using this Brad Penn 80w-90 GL-4 gear oil? 4 quarts on Amazon are $29.79. About 1/2 the cost of the Sta-Lube and it looks to be for the exact same application.

 

[AR67GTX]

I buy Sta-Lube GL4 transmission lube at NAPA in my area.