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  1. 95TwinTT

    Update on the cracked flexplate....

    The 285’s have been fine except when hitting sever bumps, like bad rail road crossings at speed. Then the front’s would rub the top opening of the fender when the wheel would bottom out, on the outside of the tire wall. I messaged the top inside of the fender openings with a big rubber hammer...
  2. 95TwinTT

    Update on the cracked flexplate....

    The rims are 9” wide. They look good with the 11” wide tires. The front drive shaft was not back in the Tahoe, for the initial tests, so I have yet to test with four wheel drive. What I did discover is the stall speed is now high enough to be into the “turbo chain reaction”. I need to...
  3. 95TwinTT

    Strange electrical problem?

    If that main cable has seen major shorts several times, it is damaged. You need to replace that cable from the battery to the starter. After copper has been fried a few times, it looses it conductivity and has a rise in resistance. The replacement should include the smaller cable that...
  4. 95TwinTT

    Update on the cracked flexplate....

    Update on the 4L80e, leaking torque converter seal… After discovering the cracked flywheel and grooves worn in the TC collar, had caused the seal to leak. My trans tech, needed to know why. He found the trans case itself was distorted by 35 thousands. That caused the stator spline to wear...
  5. 95TwinTT

    4l60e conversion

    When you mentioned the trans “went again” after 4,000 miles, did that mean that it was a total rebuild to begin with? I would want to answer the question as to why it failed before jumping off into a different type. Could be there is something wrong with your setup in the ECM or ? If so...
  6. 95TwinTT

    Ordering 4L80E + Torque Converter

    A good converter will be in the $1,000 range. Converters are an art to themselves. There are so many variables. I only trust the guys at Midwest Performance Converters. They make precision converters. http://midwestconverter.com/SLING.html Check out the questions they ask for...
  7. 95TwinTT

    Ordering 4L80E + Torque Converter

    You should not have to modify the cross member. Look at your frame, there should be another set of bolt holes south of the current location. Just slide the cross member to the next set of holes. The mount itself, should fit the new tranny. Don’t get carried away with a external cooler. The...
  8. 95TwinTT

    99 tahoe cabin noise - sounds like vacuum

    It’s been a while since I was inside the dash, but isn’t there vacuum lines that control the heater and air con, vent doors, that run into the temp control module?
  9. 95TwinTT

    Flexplate Failure

    Initial report from the Converter guys is that the input female spline in the TC was almost stripped out. That doesn’t make a lot of sense, because the input splines of the 4L80, that mate with it, are perfect and look like brand new. Maybe the heat treatment did not take……… They were going...
  10. 95TwinTT

    Flexplate Failure

    The Converter guys just received my problem TC this morning. Not sure how soon they can get at it, but hope it is with in a day or two. They are very fast once they start on something. Flexplate was ordered from GM this morning. I was hoping to be going together on Wednesday, but it could...
  11. 95TwinTT

    '99 yukon Is getting anti freeze in the oil

    Summit has a gasket set for Intake Manifold for $36.95. You could spend that much doing a couple of oil changes. Guess it depends on if you want to gamble on blowing the engine. With the amount of water described, it is most likely a intake gasket with the coolant flowing through the...
  12. 95TwinTT

    '99 yukon Is getting anti freeze in the oil

    You should not take a chance on running it any further. It is most likely a intake gasket. You can take out a rod bearing or worse by running it with coolant in the oil. Start by taking the intake manifold off. If you don’t see clear evidence of the leak on those gaskets, then you can...
  13. 95TwinTT

    Flexplate Failure

    I’m hoping I caught it soon enough. The only symptom I had was a slight leak from the front seal. I should get the news from the converter guys by Tuesday at the latest.
  14. 95TwinTT

    Flexplate Failure

    My transmission guy said, no big deal. Midwest Converter’s will cut it open on Monday and weld in a new front collar. They will check out all the other goodies while it’s apart. I was going to have them adjust the stall speed, while we had it out, but I had not gathered the info they...
  15. 95TwinTT

    Flexplate Failure

    Here is something you guys might find interesting. I dropped the 4L80e today to replace the front seal. It had started leaving some spots on the driveway. Turns out the flexplate was cracked all around the bolts holding it to the crank. That had caused it to run slightly off center...
  16. 95TwinTT

    Electronic LSD lockers?

    A Detroit TrueTrac will not slip. It will be there when you need it. It is also one of the few diff's that allows turning without binding. :)
  17. 95TwinTT

    Electronic LSD lockers?

    The Torsen design positraction is what you need. It is simple, foolproof, has no clutches to wear out and allows turning like a open differential. Detroit makes one under the name of “Trutrac” or Truetrac”. There are also several other makers out there. They have the worm gears in place...
  18. 95TwinTT

    I have an issue, need some help.

    Locate the control box. It is probably under the dash on the drivers side. There should be one wire with a "in line fuse". Cut the wire up stream of the fuse and hook the two cut wires to a toggle switch and mount it to the bottom of the dash. It can be out of sight for that matter. You...
  19. 95TwinTT

    I have an issue, need some help.

    Why not just put a switch on it. Turn it off when you don't need it and turn it on in cold weather when you are driving everyday. That would give you the best of both worlds. :)
  20. 95TwinTT

    Engine Fuse blowing

    Double check all the connections on the wiring harness. Make sure the plugs are in the correct holes and seated all the way in the ECM. Also check the individual plugs on the ECM to make sure all the pins on the cinch connectors are clean and straight. Also check for pinched or cut marks...
  21. 95TwinTT

    too good to be true?

    You need to find out more about how this engine is controlled. It takes more than just a "tune" to make a blower on a bored out 454, run perfect. Having new head gaskets is nothing to brag about, it is a red flag that something went wrong and they don't want to invest the money to fix it...
  22. 95TwinTT

    Transmission Temp Gauge Question?????

    Your trans, already has a temp sensor. Just get an inexpensive OBD2 reader, and plug it in, set to trans temperature, when pulling the trailer and it will monitor the temp. Sounds like you don’t kneed it when not pulling the trailer. Simple solution and the OBD2 scanner, can come in handy...
  23. 95TwinTT

    ok NOW i need some help

    It's a long shot, but double check the connection on the oil pressure sending unit. Pretty sure these trucks shut off the fuel if the oil pressure doesn't come up. Could just be running out the prime...........
  24. 95TwinTT

    Transmission mod questions

    Did you ask them why they don't like shift kits?
  25. 95TwinTT

    Dual Whip Antenna's

    You should just read up on the laws of AM Mobile Radio Transmitting. It’s a lot easier than experimenting. Your truck becomes the “ground plane”. The precise placement of the antenna, determines the strength and direction of the signal. For Omni directional transmission, the antenna...

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