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  1. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    Yeah, no problem. My wife just drove it to Idaho and is on her way back. I've just got the cruise and low RPM/low throttle portions of the tune somewhat dialed in and she is averaging ~15MPG.. which is pretty decent for 4.10's, 32" tires, and a 6400lb brick. I think once i get the EOIT adjusted...
  2. Bextreme04

    Rpm’s at Hwy speeds

    I'd find a way to check the tach against a know source. Maybe get yourself a new tach, but it is an awful huge coincidence that by confirming you do in fact have a 700R4 and 3.08 gearing... the RPM the tach is reading EXACTLY lines up with what it would read if it is in 3rd gear. :shrug: It's...
  3. Bextreme04

    New to this: Rear end alignment?

    probably an issue with the alignment in the front that shows on all four tires due to tire rotations.
  4. Bextreme04

    Rpm’s at Hwy speeds

    The bottom of the pan... so that we can see what model it is. Does that partial VIN stamped in the rail match the truck? If it does, you can also verify by looking at the RPO's listed on the SPID sheet inside the glovebox or on the fenderwell.
  5. Bextreme04

    Rpm’s at Hwy speeds

    Yep, that checks out. 3->4 shift at 3100rpm would drop you right at 65mph and 2170RPM assuming a 6% converter slip. If it stays that way though... you probably aren't getting converter lockup. With the converter locked it should drop you down to ~2030RPM. Converter unlocked: Converter locked:
  6. Bextreme04

    Rpm’s at Hwy speeds

    Here's an easy test comparison. If you DO have a 700R4, here is an easy light throttle shift schedule for a 3.08 ratio above and a 4.56 ratio below. See which one looks like what your truck is doing. As you can see.. the amount of engine RPM lost at the shift is going to tell you the...
  7. Bextreme04

    Rpm’s at Hwy speeds

    This is what the shift drop in RPM should look like for a 700R4. Standard converter slip is usually less than 10%, so if your "4th gear shift" around 2400RPM is only ~200-300 RPM, its the converter locking... not a shift. 3->4 shift should be dropping 1000rpm or so depending on where your RPM is...
  8. Bextreme04

    Rpm’s at Hwy speeds

    Or just zip the diff cover off and check like numerous others have stated. Every single bit of information you have provided points to you having 3.08's and not being in OD though. Whether that is from you not having a 700R4 installed or from there being another issue remains to be seen. Is...
  9. Bextreme04

    Rpm’s at Hwy speeds

    100% not... unless you have 4.56's... which you would DEFINITELY not be able to confuse for 3.08's. Take a picture of your transmission pan and post it here. Go out and drive your truck and record the speed and RPM of every shift. You can calculate the gear ratio from those numbers. I bet you...
  10. Bextreme04

    Rpm’s at Hwy speeds

    Yeah, its called a 700R4 :) I think you are thinking of the 350C, which is a TH350 with a lockup converter. I bet the converter is locking in 3rd gear and the OP is confusing that for the 4th gear shift.
  11. Bextreme04

    Rpm’s at Hwy speeds

    If you are at 2400 RPM, you are not in OD. Are you sure its a 700R4 and not a TH350? 84 would have been a very early one, would not be uncommon for someone to junk it and go to a "more reliable" TH350.
  12. Bextreme04

    Rpm’s at Hwy speeds

  13. Bextreme04

    Rpm’s at Hwy speeds

    Have you counted the shifts to make sure you are getting all the gears? The 700R4 has a pretty good spread, so you should be able to feel/hear each shift pretty distinctly. That RPM is suspiciously exactly what you would get for your rear gear and tire size without an overdrive. Shifting into...
  14. Bextreme04

    Advice and Parts recommendations for some 6.2 cam/valvetrain work?

    Well, they were definitely not torqued. I got the trans pulled back enough on some 4.5" long bolts threaded into the bellhousing and removed, loctited, then properly torqued the bolts in. Horrible grinding clunking sound is completely gone. I had quite a big oil leak from the oil galley plug...
  15. Bextreme04

    1992 RS Camaro. First car for Der Burger.

    Interesting, maybe it was just the IROC that got the TPI with the 305? Or maybe it was a later year that they switched over... I'd say you guys got a great deal at the $2600!
  16. Bextreme04

    1992 RS Camaro. First car for Der Burger.

    I've been thinking about a 3rd gen for a beater race car for a while. I've got the aluminum Gen IV 5.3 from my suburban that needs a home and they are great platforms. Paint looks pretty rough for that price point, but if it is in solid mechanical condition and rust free with a decent interior...
  17. Bextreme04

    Np205

    They are rare and stupid expensive when you find them. What trans are you using? Looks like you have a 6.0 LS swap, did you put a 4L80 in with that? I just used a 3/4" adapter ring to convert the 4L80 index ring to a TH400 index ring size and then used a 6" long 2wd output shaft in my 4L80 cut...
  18. Bextreme04

    New member Lancaster Ca

    Ha! My mom was in the very first graduating class to attend QHHS. My best friends mom still teaches art there I think. I got out in 2010 and started doing classes there Feb. 2010. Then I took a break after my first semester to go do a contractor rotation in Afghanistan and then came back and...
  19. Bextreme04

    Np208 transfer case brace

    Which braces? He showed pictures of both. There are brackets that go under the motor mount(Post#59) and then have connecting bars from there to the threaded holes in the bottom of the dust cover(Post#57). There is also a single bar that goes from one of the transmission bellhousing bolts on...
  20. Bextreme04

    Np208 transfer case brace

    yep, that's them. I have them and the heavy duty cover/brace rods on my 454 to 4L80e. The stock TH400 to Figure 8 NP205 is also still on my truck and will need to be cut and extended when I swap the 350/TH400 for the 454/4L80. I haven't had any issues with the bellhousing or case with the 350 in...
  21. Bextreme04

    HOW GEAR OIL?

    The location of that hole and that guys statement he put 1-1/2 gallons in frightening. I can imagine those axle tubes are completely filled with fluid if that's true. I bet those axle seals aren't going to last long and there's gonna be about a gallon of 80-90 that will come pouring out of...
  22. Bextreme04

    Ethanol varnish residue: Carb vs EFI

    They exist, just not very prevalent. The only states without E85 stations seems to be Montana and Utah. We have one station in Portland, two in Eugene and one in Bend. https://afdc.energy.gov/fuels/ethanol-locations#/find/nearest?fuel=E85 I'll often fuel up with it before pulling my trailer...
  23. Bextreme04

    77 GMC evap housing seal

    Apparently it's originally a 3M product called Strip-Calk. https://www.gmsquarebody.com/threads/sealing-evaporator-core-box.10635/
  24. Bextreme04

    Ethanol varnish residue: Carb vs EFI

    True for many things.. but the one thing that has lately gotten me a little jealous is the lack of stations having E85 up here. Cali has a ton of stations, mostly central california and south of there, that have either mixer pumps or straight E85. It would be doubly nice if I could get a mixer...
  25. Bextreme04

    Ethanol varnish residue: Carb vs EFI

    No, I drain my big generator of all fuel and then run it dry because I know it could be a year or more in between times it runs. As I said in my previous post, I have zero issues with any of my stuff gumming up. Stabil will keep the ethanol from messing stuff up and the gas from separating or...

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