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Author Topic:   rear end lube
Dirt Forum Champ
Total posts: 1875
posted July 25, 2005 10:07 PM  
What do you guys run in your floater rears?
I run 80-90 now(convential) but was thinking of going to synthetic fluid, i was told it would lower the rear gear temp. So what are you guys running?

Dirt Maniac

Total posts: 180
posted July 25, 2005 10:55 PM  
I run Amsoil full synthetic, 75w90. I've run it for 4 years and haven't had a gear failure yet. The full synthetic did lower the temp of the rearend over the petroleum lube I started with.

Dirt Freak

Total posts: 338
posted July 26, 2005 06:04 AM  
80-90 works great for me, why switch.??

Covert Racing
Dirt Full Roller

Total posts: 27
posted July 26, 2005 07:49 AM  
Why switch? Lower gear temps. Which will give you more longevity of your gears. The last time a gear went out me, it also took out my $250 driveshaft and the bearing in the end of the transmission.

Dirt Maniac

Total posts: 115
posted July 26, 2005 09:04 AM  
Definitely use synthetic. Gear oil temps get very high in racing and we all know synthetic takes the heat better. When a ran conventional it always came out with that burnt smell. The synthetic never does and we run it much longer.

Dirt Forum Champ
Total posts: 874
posted July 26, 2005 09:08 AM  
I use Red-Line Shock Proof. 40 Bux a Gallon, buy 2 at a time. That way you can have a gallon in the car and one in the trailer for gear changes. No need to funnel the old stuff back into the car right away. The stuff can be re-used time and time and time again.

Dirt Full Roller

Total posts: 48
posted July 26, 2005 09:11 AM  
I noticed that when I switched to synthetic it start leaking past the axle seals. What is the fix for this? I thought someone said to pack the axle bearings?

Dirt Maniac

Total posts: 138
posted July 26, 2005 03:01 PM  
I've noticed the same thing since switching to amsoil, but mine leaks a little from the front, right where the pinion goes in.

Dirt Freak

Total posts: 259
posted July 26, 2005 03:59 PM  
Redline makes the best.

Dirt Freak

Total posts: 353
posted July 26, 2005 06:37 PM  
yep, ours leaks from the front of the pinion area also with the synthetic stuff.

Dirt Freak

Total posts: 376
posted July 26, 2005 08:39 PM  
Mobil-1 gear lube, & all the leaks you all mentioned. LOL.

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