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6.5L Diesel Engine Discuss the 6.5 GM diesel engine & associated components. Automatic transmission questions & problems belong in the 4L80/85 - 4L60E - 6L90 Transmission Forum

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Old 03-06-2010, 09:33 PM   #31 (permalink)
RCpullerdude
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Quote:
Originally Posted by extremeyoshi View Post
Quote:
Originally Posted by cbr600rx7
LOL. Yeah it fit near perfect in there and for a little over 20 bucks the gauge works great.

I went about 100 miles of mixed driving on 1/4 of a tank. My truck is a 700R transmission with 4.10 gears and 275 tires.

Should be a 4L80E unless it was swapped at one time, which would be crazy, though not impossible. 4L80E was the only auto behind the 6.5TD in a GM pickup/SUV from the factory.


if his truck is a 93, its mechanical, and those indeed did come with a 700r4 behind them, no electronics for the 4l80 to talk to so they put in the 700r4.
i used to have one, and when taking her very easy down the highway i would get extremely good mileage, as she was only spinning at 1400 rpm at 65mph, like 25mpg or better.
Even the 92 and 93 had the 4L80E. The 4L80E was the only auto put behind the 6.5TD in GM pickups (light vans too, to the best of my knowledge). The 4L80E came out in 91, and was even behind certain late 6.2's. In the mechanical Diesel applications, it had a stand alone TCM and a TPS on the IP and an RPM signal from the oil pump drive (combined with the vacuum pump on crew cabs and Suburbans in 91). No need for any communication with the engine. The 700R4/4L60/4L60E wasn't offered behind the 6.5TD because it wasn't strong enough. It was, however, found behind NA 6.5's.

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Last edited by RCpullerdude; 03-06-2010 at 09:46 PM.
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Old 03-06-2010, 09:43 PM   #32 (permalink)
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Quote:
Originally Posted by extremeyoshi View Post
Quote:
.
here before you get flamed HARD ... read

http://en.wikipedia.org/wiki/Detroit_Diesel_V8_engine

http://en.wikipedia.org/wiki/List_of_GM_transmissions

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Last edited by axiom; 03-06-2010 at 10:06 PM.
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Old 03-06-2010, 09:56 PM   #33 (permalink)
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Quote:
Originally Posted by extremeyoshi View Post
Quote:
Originally Posted by cbr600rx7
LOL. Yeah it fit near perfect in there and for a little over 20 bucks the gauge works great.

I went about 100 miles of mixed driving on 1/4 of a tank. My truck is a 700R transmission with 4.10 gears and 275 tires.

Should be a 4L80E unless it was swapped at one time, which would be crazy, though not impossible. 4L80E was the only auto behind the 6.5TD in a GM pickup/SUV from the factory.


if his truck is a 93, its mechanical, and those indeed did come with a 700r4 behind them, no electronics for the 4l80 to talk to so they put in the 700r4.
i used to have one, and when taking her very easy down the highway i would get extremely good mileage, as she was only spinning at 1400 rpm at 65mph, like 25mpg or better.
92/93 did come with the 4L80E. There was a standalone TCM that controlled the trans. YOu can buy a standalone controller which will allow you to put the 4L80E behind anything that it'll bolt up to more or less.
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Old 04-18-2010, 10:22 PM   #34 (permalink)
nogassershere
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My '93 has a 4L80E and thank goodness! The R4 would never hold up to what I have put mine through!
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Old 04-18-2010, 10:32 PM   #35 (permalink)
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Quote:
Originally Posted by cheap9665 View Post
i just removed the actuator and wired it fully closed. . . .gettin the gauge put in next week, wonder how much i can get out of it. only trouble i have had is when its under full load. . . .(gcvw over 25,000) it overboosts and takes away fuel
Mine was stuck closed when I got the truck, and when it freed itself up I took it off and wired it shut the next day. Been that way for about 40k miles now. Averaging 16mpg solo with a personal best of 18 (600 miles on one tank!). Only get about 10 when pulling the 12klb travel trailer though. My wife says that I am anal about my mpg, as I check it every time I fill up!
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All Diesel fleet here:
MKII VW Golf, '85, 5sp, A/C 2dr (sold)
MKIV VW Jetta, '00, 5sp, 245k & still chuggin'
MKIV VW Golf, '05 4dr, 5spd, RC1+ tune, straight exhaust, 100000k HIDs
'93 GMC 3500 srw, 6.5tdsl, extcab, 4wd, 8'box Banks exh, Injector nozzles, Custom air filter and tubing. 123 gal fuel capacity (dash switched w/factory gauge.) 5k Air Lift bags w/onboard compressor and auto level (always tows level.) 1/8 turn on IP metering screw. Conversion package with sunroof. Dmax roof lights. 200k+ working miles
'02 Crew Cab 3500 Dually, Banks 6 gun, loaded...

Never argue with stupid people, they bring you down to their level and then proceed to beat you with experience!
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Old 04-25-2010, 12:28 AM   #36 (permalink)
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So what would be the Max boost that a 96's turbo would put put under a load if the wastegate was wired shut? Has anyone made a aftermarket electronic controller to control the stock Vac-solenoid?
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Old 04-25-2010, 01:16 AM   #37 (permalink)
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Quote:
Originally Posted by nogassershere View Post
My '93 has a 4L80E and thank goodness! The R4 would never hold up to what I have put mine through!
X2......

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Last edited by turbonator; 04-25-2010 at 01:18 AM.
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Old 06-19-2010, 12:19 AM   #38 (permalink)
mattchatman
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Hey I've also got the 93 mechanical 6.5 with the spring actuator on the wastegate. I'm curious if my wastegate is working correctly, I know the spring is good because i took it off and checked it but the wastegate never moves when reving the engine. Should I be able to see it move when reving the engine or does it need a load? Also I have very little power at RPM below 2000. Can barely take off uphill. I think it's a fuel pressure problem but i'm curious what the closed wastegate could do.
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Old 06-19-2010, 12:23 AM   #39 (permalink)
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it needs a load
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Old 06-19-2010, 12:46 AM   #40 (permalink)
nogassershere
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X2, it needs a load to build up enough boost to overcome the spring pressure.

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All Diesel fleet here:
MKII VW Golf, '85, 5sp, A/C 2dr (sold)
MKIV VW Jetta, '00, 5sp, 245k & still chuggin'
MKIV VW Golf, '05 4dr, 5spd, RC1+ tune, straight exhaust, 100000k HIDs
'93 GMC 3500 srw, 6.5tdsl, extcab, 4wd, 8'box Banks exh, Injector nozzles, Custom air filter and tubing. 123 gal fuel capacity (dash switched w/factory gauge.) 5k Air Lift bags w/onboard compressor and auto level (always tows level.) 1/8 turn on IP metering screw. Conversion package with sunroof. Dmax roof lights. 200k+ working miles
'02 Crew Cab 3500 Dually, Banks 6 gun, loaded...

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