LUVTruck.com

What oil are you running in your trans.?

The book says 30 or 40 wt motor oil.
Has anyone tried Lucas or synthetic or 90 wt gear oil?

I'm putting my truck back together and motor oil just seems so thin.

_________________
OK, I'm over it. Where's the beer?

I hear you on that one rondog! I just flushed and filled my tranny with 40W motor oil and was thinking the same thing about synthetic gear oil. My tranny wine's real loud and is real strong but I think a synthetic oil would do much better. I was thinking of changing my rear end oil out this weekend so there is no better time to flush and fill the tranny!

_________________
80 luv 4x4, 2-1/2" torsion lift, 31x10.5/r15, 3" body lift, soon rear shackle lift.

85 monte carlo, goodwrench 350, cam, headders, intake, U know... the works.

If you put a heavy weight gear oil in the tranny the syncros will be as tight as buggery and you will have a real hard time shifting gear. Especially so in a colder climate.

I shandied up the oil in the old box in my spacecab. It was a real noisy one, 50/50 gear and engine oil dont know if it did much good as i must have pinched the rear seal putting the tailshaft back in it and once the box got a bit louder it was too late to save it after running dry for a few weeks.

Would depend on how tight your syncros were as to how heavy you could go with the oil.

Someone told me that the synthetic Castrol VMX40 was the bomb for Isuzu boxes. Its a bit pricy for me. What i use in the engine goes in my gearbox.

Cheers. Bob.

_________________
Current project, 1979 KB Isuzu Ute.

Daily driver, '86 Rodeo Spacecab.
Chasing parts for Isuzu Impulse.

i use hd30 in my tranny. works great.

_________________
"but its that gut feeling of you're drawn to what feels right for yourself and what you're passionate about..."

Once I had to drain the transmission and ran out of gear oil. I used Mobil1 10W30 synthetic motor oil. It worked so well, that's all I used from then on. It's been working great for years.

_________________
You went there in that?!?!

That's what I put in my LUV's tranny before it started to whine, doesn't help, I even put about a 1/3 quart of lucas in it to help the whine, Should've put more in it, but it didn't help. The guy that bought my truck said that a gear that only works in 3-5th gear wears out and makes the whine... Not sure what I could've done to cause that....

_________________
-Old ride-82 Luv diesel 5spd with some upgrades
-Past rides-82 Sierra, 78 Coupe De'Ville, 91 2dr Blazer, 86 RX7, 86 Porsche 944T (rear-ended and totaled)
-Curr. rides- 1970 Ford LTD 4dr, 390 4Bbl, 2nd owner! With a few Extras 00' Civic beater...