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  1. Logbed

    700R4 Information Thread

    Thanks for the infos. About the lockup: I replaced the lockup solenoid, now I saw and heard it click with the manual switch. It did not fix the lockup except once or twice with cold engine the converter has felt like it locked up when testing with the manual switch. I called a...
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    700R4 Information Thread

    Hi, I have had a professionally rebuilt and strengtened th700 for a while, but it wont shift to the 4th gear or lockup the converter. At first I thought that it shifts to the fourth, as it feels like downshifting when I engine brake and move the shifter from OD to D. There is a soft jerk that...
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    1985 C10 shock recommendations

    Can you recommend shock absorbers for a normal ride height C10 1985 longbed? I'm after comfortable ride over speed bumps and bigger jolts. Right now there seems to be very little if any rebound absorption specially at the rear. My shocks are worn for sure but looking at the old Chevy commercials...
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    Softer suspension with longer travel (not a prerunner, but that style)

    Probably doing that since front suspension upgrade might be too costly and the rear suspension need be vastly improved to justify any upgrade in the front a arms. Nevertheless I''m still interested in the options for a good front and back mid-travel suspension too. What I've come across for 2wd...
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    Softer suspension with longer travel (not a prerunner, but that style)

    Hi, I've got a 1985 C10 longbed that's rolling on 31x10.5x15 all terrain tires and GM original optional 8x15 "styled sport" wheels. It's got stock suspension which up front is ok but specially rear is bouncy and stiff. I do not carry heavy loads. I'm a big fan of prerunner trucks, those off-road...
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    Where to mount TH700 manual lock-up switch?

    I have the cruise control on-off switch unused since I have no cruise. It would be in my fingertips so using it would be pretty smooth I guess. I was figuring if I could use it for grounding the green manual lockup wire from my TCi 376600 vacuum lockup control. Anyone done this? Is it properly...
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    Where to mount TH700 manual lock-up switch?

    Hi, What kind of switches have you used and where have you mounted them for practical operation? Pictures?
  8. Logbed

    Wheel/Tire Opinion

    Ended up with a set of General Grabber 31x10.50R15 tires on original GM PA06 optional 8x15 wheels. Very happy with the solid looks and buttery ride that makes potholes almost disappear.
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    Fender emblems without drilling holes?

    I was thinking about reinstalling the emblems but I would not like to drill the holes if that's avoidable. How is the emblem, is there good surface on the backside for adhesive material? Any experience on this?
  10. Logbed

    '85 C10 Silverado stock wheel size

    Hi, I have read many people refer 8x15 as the stock wheel size. This table seems to show 6 inch width as the stock wheel. https://www.wheel-size.com/size/chevrolet/c10/1985/ The rally wheels of my truck are 6.5x15 and I have wondered if they are the originals?
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    Shopping parts in SoCal?

    I might be flying from Europe to travel around San Diego - Long Beach in May. If I wanted to buy a posi differential and gears as a souvenir;):p are there retailers that you would recommend with prices comparable to Jegs and Summit?
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    Outline white letter tires

    Googled a little. From Coker tire site: " The Goodyear GT Radial Customgard Flexten tire features extra wide 255/60R15 sizing, which was specific for 1978 and 1979 Corvette pace cars. The outlined white letters are authentic for the era, and the sizing is excellent for restored cars or...
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    Outline white letter tires

    Sorry I was not specific enough. I meant did we have outline white letter "OWL" tires like the Grabbers in the picture during the 80's? Or were all white lettr tires during the 80's with full white letters "RWL" like Cooper Cobras?
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    Outline white letter tires

    When did they come? Just wondering are they "period correct" for a mid-late 80's truck? I remember the white letters from my teen years but outline style I do not remeber.
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    Wheel/Tire Opinion

    I rechecked our local laws on tire sizes. Seems like now even 15% change in diameter is ok so that's not an issue. With that in mind the options would be: - 31x10,5x15 BF Goodrich All Terrain TA:s? - 255/70R15 Cooper Cobras? Two totally different styles. The pricetag recommends Cooper Cobras...
  16. Logbed

    Wheel/Tire Opinion

    Same situation here, except I'm going to keep my 6,5x15 rally wheels. I currently have Bridgestone Dueller HTS 255/60R15 up front and 275/60R15 rear under my '85 normal height 2wd longbed (the red truck). I'm after some more rubber height and retro look. Right now I'm torn in between 255/70R15...
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    Wheel spacers or adapters w. 6.5x15 rally wheels & stock ride height?

    Hi, My '85 longbed is currently on 255/60r15 front, 275/60r15 rear tires on stock 6.5" in wheels. The plan is to get 255/70R15 white letter Cooper Cobras all around to gain some tire height and visual mass. I've also played with the idea of widening the rear track a bit and maybe just a little...
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    Gearing for performance TH700R4 + 3.73 ?

    I checked the diameter and used a gearing calculator. Your 3.73 El Camino gearing was indeed almost excactly the same as 4.10 with 255/70R15 tire size.
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    Gearing for performance TH700R4 + 3.73 ?

    Ordered an upgraded TH700-4r trans, will be installing it next month. Now thinking about the gearing... How big were your rear wheels in the El Camino? I was toying with a gearing calculator and noticed that if your tire size was anywhere near normal El Camino, my truck with 275/60R15 or...
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    28 or 30 Spline Information

    Same dilemma. '85 C10 silverado 305+Th350. Looks tell its 10 bolt 8.5, speed+rpm+math tells the ratio is 3.42, but is there any way of telling the spline count from outside? I can't be sure if it is the original axle.
  21. Logbed

    Gearing for performance TH700R4 + 3.73 ?

    Thanks for the very good insights. The trans&gearing mod is not for free nowadays, but sounds like worth it. I might even go for the suggested 4.10 gears as there's always the option to go back a little in overall gearing by changing the tires to higher profiles (which In my eyes fit well to a...
  22. Logbed

    Gearing for performance TH700R4 + 3.73 ?

    Not worried about the rear swinging, more like waiting for it, although like you said, I must be realistic with the power I have... Off topic: Actually, right now there's 6" of new snow outside and my daily driver, a TT Quattro 3.2 with studded snow tires, had the ESP turned off like I have it...
  23. Logbed

    Gearing for performance TH700R4 + 3.73 ?

    How is it, if the quicker ratio, higher stall and lower 1st gear make the wheels spin, is it always going to be one wheel only unless I have a limited slip diff? And If I install limited slip kit, am I too modestly powered to spin both the wheels? (You wouldn't think a middle aged man has...
  24. Logbed

    Gearing for performance TH700R4 + 3.73 ?

    Thanks, 4:10 made me think, I'd still have 10% longer 4th than my current 3rd, but the 1st would be 30% shorter!
  25. Logbed

    Gearing for performance TH700R4 + 3.73 ?

    Which model World Product heads did you have? How big and around where in the powerband was the power improvement compared to stock heads? Asking out of interest, maybe something to do during the next winter? Right now my assumption is that I'd get more "0-60 performance" with drivetrain...

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