whiteboyslo
OBS Enthusiast
Hey all -
Just picked up my new-to-me 1993 C2500 Suburban and am curious what the conventional wisdom is on servicing the transmission. It has a 454 and 4L80E with 145K miles on it and shifts very very well. The 1/2 is a bit firm when cold but everything else is butter. The fluid is kinda more light brown than pink, but doesn't smell burnt.
I've heard some who say that, if the transmission is fine and the mileage on the fluid is unknown, that it may just be better to leave it alone. It sounds wrong to me, but I don't want to tempt fate on this truck, either. So what should I do? Should I just drop the pan and change fluids and the filter? Should I flush it? Or should I not touch a dang thing and just keep driving it as is?
Sorry if this is the transmission equivalent of 'what motor oil should I use?', but it's been a bit a LONG time since I bought something pre-owned with a slushbox. I typically row my own on my older rides, and the newer ones I keep up with the maintenance from Day 1 to avoid this kind of stuff.
Mike
Just picked up my new-to-me 1993 C2500 Suburban and am curious what the conventional wisdom is on servicing the transmission. It has a 454 and 4L80E with 145K miles on it and shifts very very well. The 1/2 is a bit firm when cold but everything else is butter. The fluid is kinda more light brown than pink, but doesn't smell burnt.
I've heard some who say that, if the transmission is fine and the mileage on the fluid is unknown, that it may just be better to leave it alone. It sounds wrong to me, but I don't want to tempt fate on this truck, either. So what should I do? Should I just drop the pan and change fluids and the filter? Should I flush it? Or should I not touch a dang thing and just keep driving it as is?
Sorry if this is the transmission equivalent of 'what motor oil should I use?', but it's been a bit a LONG time since I bought something pre-owned with a slushbox. I typically row my own on my older rides, and the newer ones I keep up with the maintenance from Day 1 to avoid this kind of stuff.
Mike