I've been reading that the stock transmissions are kinda weak, i was wondering if anybody has installed or knows of better transmissions than the 4L60.
If you need to beef it up due to increased power or excessive abuse, there is the 6L70E from a TBSS but may be difficult to find.
limitation I have heard of is the design of the case may cause slight fluid starving during the 2 to 3 or the 3 to 4 shift
I want to speculate that was with the earlier 700R4 variants and not the 4L60(E), if I'm understanding you correctly. I believe holes were added around the planets to aid in more fluid reaching the planet bearings.
@GreenMachineTB How many miles are on your trans, service history? For sake of conversation, I honestly don't believe there's a finer automatic trans for our platforms. Definitely not trying to jinx you but with proper maintenance the 4L60E is a dependable trans.
There are upgrades avail that require removing it to truly turn it into a near trouble-free unit if so desired.
Adding an external cooler is always a good idea, even if you can drop the operating temp 20 deg.
I do plan to beat the hell out of it.Gmcman, I wish I could remember my sources but it was too long ago. Either way, I drive like an old man in my personal vehicle.
I only know how well it was maintained from the person i bought it from, i do onow the engine was already replaced. Thats about it.
Sorry, it has 190k. From what you say, it's pretty sound running. I'll have to check fluids today. Im going all the way down to corpus Christi I'm sure i can talk the convoy into a side stop seems how there will be at least two other TB's that plan to beat the hell out their trucks like ibplan to.Mileage on vehicle? Check the fluid level with trans hot, engine idling, and level surface.
If the color of the fluid looks good, red or light pink, but not dark or brown with a burned smell, then you should be good.
From a stop, if you can pull away at 1/4- 1/3 throttle and not get a jump in RPM between shifts, especially the 2-3 shift, and all shifts feel good, then without driving it I would suspect it's somewhat healthy.
What part of Texas are you going to? If you are going near Amarillo, maybe make a stop at Crich Transmissions, I've been following this guy for awhile and I'm amazed at his knowledge of these transmissions. His YouTube channel is fascinating if you're into the mechanics of transmissions. Between him and Dana at ProBuilt Automatics, in Ca, I cannot think of anything they couldn't do with one. Dana is excellent to speak with and purchase parts from. If I was withing a few hours of Texas, I would absolutely have a 4L60E built from Richard.