Topic: Heavy Gear oil fumes in cab

[LA_Fred]

I recently had a dual t-case w/ 4.7 gears installed in my truck(89 x-cab v6) along with a short throw tranny kit and a new clutch and all I can smell in the cab is gear oil.   I checked the shift boots and they appear to be good. Has anyone else had this problem?

[Marlin]

In summer heat, and heavy service situtations, I have received some complaints. However, once the truck is up to speed, and the trans-Marlin box-rear t/case cools down, the smell will go away.
Cheap gear oil, torn shifter boots, leaking valve covers, new exhaust stystem, ect., are possible other causes.

Marlin

[gferris5]

I had a similar problem-due to my own stupidity, when I cut the hole for my second case, I didn't account for the added torque movement and the edge of the cut ended up cutting the crap out of the shift boot- a little more filing/bending and a new shift boot have made life much better except for the residual gear oil on the carpet that was getting wet. ew.

[brainlessfool]

hummmmmm, did you check that bottle of gear oil behind the seat?

[stone4x4]

your exaust is to close to the new tcase

[84runner]

So what is it?

[stone4x4]

it is a v6 two pipes most muffler shops get them to close to the second case to stay away from the gass tank

[LA_Fred [OP]]

I've got to check that but it is definitely a possibility. What's the best way to route the exhaust in this case?

[stone4x4]

are you driving or setting in trafic?
Do you have body lift . How much. You need three inches You can run it to the out side of the frame,between the cab and frame.
The other way is make a heat shild,there are millions of diff heat shilds

[LA_Fred [OP]]

Hey Stone 4x4, I've got about 5 inches of suspension lift and no body lift. The oil fumes tend to come and go either when I 'm in traffic, on the freeway at speed or on the trail. You may be right in the sense that the exhaust is heating up the t-case and the only place where the t-case can breathe is through the shift boot and hence into the cab. I'll look into fabricating some sort of heat shield. Have you had a similar probllem?

[stone4x4]

yes my bud has a v6 same thing
i have a 5mge exaust comes out wrong side so i made a stak thew the bed in the pass corner    works great
let me know how yours works