I have owned the Suburban since new. To replace it would cost about $100,000........So I am keeping it up. I'm on a road trip now.......3000 miles. 17.5 MPG

Anyway, You know how in drive you can push down the gas pedal and it will shift down, 4th/down.....I forget the name. I usually just shift it into 3rd.......further lower...............because in 4th/downshift it either accelerates and "hunts"(I don't know the real term)

I would like a switch that allows ME to control 4th/downshift..........not the stupid transmission. If I want to keep that gear it would stay until I switched the switch again.

Is this possible? Kind of like a manual/automatic

If this is the standard 1/2 ton with the 4L60E (electronic shift 700r4), I'd skip the OD and drive it in 3rd.

If I were you I would call and talk to the folks at Precision Transmission in Amarillo, TX. I've watched a number of teardowns from their YouTube channel and they all seem to really know their stuff.

quote:

Anyway, You know how in drive you can push down the gas pedal and it will shift down, 4th/down.....I forget the name. I usually just shift it into 3rd.......further lower...............because in 4th/downshift it either accelerates and "hunts"(I don't know the real term)

Since this should be a 4 speed auto I got to wonder if you are not confusing the torque converter lock up and unlocking with a gear change? Your 3rd gear should be 1 to 1 ratio and 4th gear is an overdrive. Does this have stock size tires on it per door sticker or does it have taller than stock tires?

quote:

Originally posted by vulrath:
If I were you I would call and talk to the folks at Precision Transmission in Amarillo, TX. I've watched a number of teardowns from their YouTube channel and they all seem to really know their stuff.

OH yeah!!! Agreed. I like their videos. Good folks. I am 250 miles to Amarillo and if I need a transmission job, I'll haul that sucker there and pay them to do the job right.
.

In that era, GM faced troubles with what they termed "hunting." The transmission would not remain in a desirable programmed gear. Slight changes in driver input could create changes in the selected gear.

In addition, the torque converter clutch lock up could create a shudder feeling. A low frequency but noticeable physical vibration would be felt.

One cause for transmission issues is fluid beyond its life expectancy. The chemistry within has a number of carefully selected friction controllers, and over time, these molecules can oxidize or react becoming non-functional.

If one chooses to change the ATF, the method of changing the fluid is debated. Most people say "don't change it if you've never changed it and it is over xxx,xxx miles old." Many people say that power flushing the transmission fluid stirs up bad deposits and puts them into the transmission valve body where they effectively kill the transmission.

A modern ATF, made for GM, such as the "DEXRON VI" fluid, may help with your older unit. New DEXRON III would be hard to find. Properly changed, such as a partial drain and fill, the risk can be minimized.

OK.....Yes, it is the torque converter lockdown that I'd like a manual switch for.

I do have aftermarket wheels and tires, but they come out to the same diameter. The speedometer is right on to GPS speed.

I've religiously changed the fluid and filter every 40,000 miles. Never had a problem. I'm sure that it is operating just perfectly.

I just want my own switch. But WTH, minor liife problem!!

Would something like this work? https://www.monstertransmissio...Lockout_p_11535.html

Thank you, triggerTreat

quote:

Originally posted by triggertreat:
Would something like this work? https://www.monstertransmissio...Lockout_p_11535.html

^^^^^^^^^^^^^^^
Link posted for lock-out switch above I believe is for transmissions prior to 2000. I could be wrong, but check.

If want your shift points changed your gonna need to have the trucks computer reprogrammed at a tuner shop. Or get software and cable and diy.

Lastly you can get a seperate transmission controller $$$ and adjust how you want.

Link and description of switch sold by monster below.

https://superiortransmission.c...duct/superior-pr280/

If you're the only one driving the truck, put it in 3rd and drive.

Why spend time/money on something that's not needed?