Oil seeping into dash

[tardy_pizza]

First post here. I’ve had my M1028 since December and has been nothing but a great weekend truck. Today I hopped in and noticed red oil seeping through the dash panels. Took a look around and ended up tearing the whole bezel off. Wondering if anyone’s seen something like this before.

 

[kallisti5]

Transmission dip stick tube? It's right at the firewall in the engine compartment on the middle/passenger side.
Fresh transmission fluid is red.

Power steering fluid working it way up the steering column from steering box at the opposite end of the steering shaft and "blowing" into the cabin?
The latter feels more realistic than the former

 

[Miah]

Hydroboost brake system leak @ the pushrod? Should be easy to peek under dash & push on the brake pedal & watch for leakage. (wear safety glasses pls)

 

[kallisti5]

Hydroboost brake system leak @ the pushrod?

Aah.. good call.

 

[tardy_pizza]

Hydroboost brake system leak @ the pushrod? Should be easy to peek under dash & push on the brake pedal & watch for leakage. (wear safety glasses pls)

I’m starting to think that’s what it is. Have to take a look at it in the morning.

 

[Mainsail]

Previous owner left an oil pressure gauge line back in there?

 

[tardy_pizza]

Previous owner left an oil pressure gauge line back in there?

Not that I could see.

 

[chevymike]

Yep, hydroboost leak. Rear push rod seal is likely bad. No idea on how easy to rebuild versus replacing unit.

 

[cucvrus]

Replace it. The replacement comes with a Lifetime Warranty.

 

[tardy_pizza]

Replace it. The replacement comes with a Lifetime Warranty.

Do you replace the whole unit or just take it off the firewall and do the rear seal?

 

[Russm]

Do you replace the whole unit or just take it off the firewall and do the rear seal?

replace the whole thing. Its not expensive

 

[tardy_pizza]

replace the whole thing. Its not expensive

Well I’m out here tearing the bezel apart thinking I’d clean the oil off of everything. Looks to be the speedometer cable.

 

[Russm]

the speedo cable is supposed to be lubed with thick axle grease. Unless your PO put something else in there?

 

[cucvrus]

Reach up under there and disconnect the speedometer cable from the back of the speedometer. You should be able to pull the cable out of the cable housing. Clean and grease the cable with cable lubricant. I guess it is possible that transfer case ATF is traveling up the cable. Check how full the transfer case is by removing the top 30MM plug on the rear of the transfer case. You should just be able to touch the fluid. it should not be running out. If it is running out the seal between the transmission and transfer case has been compromised. Not a huge repair but will require removing the transfer case. I had this happen to a few customers. Never had it all he way up the cable but seen it leaking out the breather. The transfer case breather may be clogged also. It could be as simple as that. Check that first. Passengers side of transfer case top side. it exits out the tail housing via a 5/16" metal tube. Good Luck. Be Safe and Please Report back.