Ok, my new 93 has a auto and I have NO CLUE as to how it's supposed to work, correctly that is. Here is some info....

276,xxx miles on and it feels strong. As in, under full throttle and the fuel cone set at its deepest point (sorry, no gauges yet) it shift firm and loads the engine. Fluid is full and of good color, no burnt smell.

Now comes what I need help with:

I notice the temp gauge going up and down with throttle response. I has an auxiliary cooler in front of the drivers rear tire but since it leaked, they put a bolts into the line and clamped them shut. Is this the "big" and "coveted" cooler with what looks like a fan? Is the temp supposed to do that? Radiator is full and no oil in it.

The tranny loads the engine but there is almost no seat-of-the-pants feel until the motor get high into the rpm band, what seems like the last half of the defuel point. Also, it gets going better when I downshift to bring it back up and then it upshifts firm. I also hear the turbo spool but some times the engine doesn't get the truck going. Example: I am driving at around 30mph in 3rd. I hit the gas and the truck starts to go, turbo spools, but it just slowly get up to speed until about 40-45mph and then the truck takes off like a banshee out of hell until OD then it still is moving! Now if I were to force it to down shift at 30, get the engine wound up at about 35, then put it back in drive, it get to speed a whole lot quicker. Readers digest version, I shift it, I get to speed faster.

When should the tranny shift into OD? Under very light to no throttle, it shifts at 35.... If I light foot it, I keep it in OD. If I need moderate to heavy response, it shifts into 3rd.

Also, what mpg's should I be getting? I have 3.54's no-slip. I got between 17-19 on my old 93 4x4 with 4.10's and stick.

Thanks for any and all help. I miss my 5spd....

Jon

 

19-21 mpg is doable depending on your right foot, we had the EXACT truck and drove it for a few months and bone-stock it got 20.3 out on the highway.

That cooler you got under the bed is a pretty rare and cool option, it has a fan but the factory temp switch is set so high on the fan that the damage is already done to the trans by the time it kicks on. I'd fix the leak, unplug the lines and hotwire the switch.

It sounds like it may be shifting early for you liking, you can adjust the TV cable and make it shift later, TV adjusting procedure is in the sticky. we see the same thing with all our auto trucks, if you shift manually and let it wind up it pulls harder. sounds like you need more pump mods

also you can install a $10 Potentiometer instead of the factory TPS so you can control what speed Overdrive comes in by just turning a ****.....and then you rule out that little $200 turd ever going bad and leaving you stranded.

hope this helps, sounds like your truck has a half decent factory torque converter in it but when mods come that will start to go away gradually...

 

If the trans cooler lines are indeed connected to the steel cooler lines and plugged off, you have no flow through the cooling circuit. Are the connected at the front of the trans, or is the entire circuit bypassed? The fan comes on about 180* , so it's not cooking the trans fluid. It's the temp switch that kicks the tranny out of OD that goes off at too high of a temperature.

 

Actually Crossy, the tranny looks sorta new. There is oil all over the underside like a leak happened at the tail shaft BUT there is no leaks on the tranny. Makes me think....

dodgenstein, it has a circuit, the additional cooler is tee'd in....

 

A 366 spring would help! And i would try adjustin the TV cable and the TPS. look in the sticky

 

someone told me on here their under bed fan didnt kick on till 225 degrees.

It will still have a trans cooler up front. and the one under the bed

 

The one under the bed was supposed to be in series between the hot line of the trans and the heat exchanger on the passenger side of the motor. Don't think the flow would be right if it was teed in.

 

Stock converter? Sounds pretty much like an automatic to me

 

JQmile- I was thinking the same thing. Sounds like a stock truck with a stock convertor. Put a convertor and valve body in and it will really wake the thing up, dont have to touch the pump. My buddy has a 93 we are buying from him, and he recently had the auto rebuilt, and it is a whole new truck.
With stock IP flow, and a built auto, it will run circles around my mom's, which has 100cc IP flow (stock +~35%), and a stock tranny. Havent driven it enough to test MPGs, but I'd expect them to be up, if I can keep it under 80.

 

It sounds to me like the TPS works fine, I would leave it alone.