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Thread: overdrive trans

  1. #1
    VCVC Member garagedoordennis's Avatar
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    overdrive trans

    1968 Chevy 90 250/700r/Fuel Injected - sold and missed
    1966 Chevy handyvan 350/auto (work in progress)
    1965 GMC 350/auto ( just had to have )

  2. #2
    VCVC Member SAVAGE's Avatar
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    Think, Mark(108 Vanguy) has something like this in his van???
    Tom

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    Could Be Right

    The picture is too blurry to make out but the casting that needs to be seen is the one on the back part of the trans which is the OD. The correct casting for our vans is R10-Q. An OD with that casting number will fit right into our 2nd gen vans with no change of driveshaft. 1st gen vans with the original coarse spline yoke will need to be changed to the finer spline 2nd gen type. A custom trans hanger mount can be made or purchased from me. this will allow the use of the original trans mount location which is directly over the trans. You can also use a universal trans mount that runs from left to right if you have the room with your exhaust system. The solenoid on these should be checked before purchase. Apply 12 volts to the can on the driver's rear side and you should hear a click. If you don't hear a click then a new solenoid is about $350. Other internal parts can also be blown out if this was abused or ran on a high power V8. The planetary gears cannot take high torque and are a weak spot. This requires disassembly.
    I have been running an OD for several years now. I love it. When I had a 3.08 rear axle, I was getting 21 mpg on my drives to Tacoma, WA and back. Now with the 3.36, I'm down to about 18 mpg but I also have a weak exhaust valve. Smiley has one installed in his Blue Overdose and gets even better fuel economy than mine. (Of course his is usually parked on a trailer and towed from place to place) ;>)
    $600 is a great deal if it is in good shape.
    108VanGuy...
    1969 Chevy Panel, 250 CID, 3 Spd.with OD, 3.36 "WedgieVan" Daily Driver
    1967 Chevy Panel, 230 CID, 3 Spd. 3.36 "UtiliVan" 292 TFI coming. Owned since 76
    1964 GMC Panel, 194 CID, 3 Spd. "CrunchoVan"
    1965 GMC HandiBus Custom, 194 CID, 3 Spd. "MilkVan" Seized Engine
    1965 Chevy Panel 350 CID, 3 Spd. "RustoRoof" Runs but wiring bad
    1969 Chevy 108 Display 307 CID THM 350 Power Brakes 3.73 Posi
    1965 Chevy Panel, V8, 3 Spd. "Gold Hills Van" Best body of my 65s
    1965 CamperVan, V8, 3 Spd.

  4. #4
    Certifiable Vanatic RAY68108's Avatar
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    Hell yea, nice find Dennis.
    68 108 panel parts donor
    69 108 sportvan deluxe 350 4bbl 700R4 3:36 posi
    68 108 sportvan custom 350 4bbl 700R4

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    Certifiable Vanatic RAY68108's Avatar
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    Thanks 108vanguy, You just answered all the questions I was thinking...I have the 4spd/reverse column with a good saginaw 4spd...swap that O/D tailshaft and it will rock...
    68 108 panel parts donor
    69 108 sportvan deluxe 350 4bbl 700R4 3:36 posi
    68 108 sportvan custom 350 4bbl 700R4

  6. #6
    Certifiable Vanatic RAY68108's Avatar
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    108vanguy, Whats the price on your trans mount?
    68 108 panel parts donor
    69 108 sportvan deluxe 350 4bbl 700R4 3:36 posi
    68 108 sportvan custom 350 4bbl 700R4

  7. #7
    VCVC Member
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    Quote Originally Posted by RAY68108 View Post
    108vanguy, Whats the price on your trans mount?
    $100 shipped.
    108VanGuy...

    Sorry, price increase for those not already committed (Freeky, Michael Swann, Ray68108). Now $200 with partial trades considered. These things are taking much more effort than anticipated. That and the cost of materials seems to have gone up a fair amount since I last bought consumables.
    108VanGuy...
    Last edited by 108VanGuy; 04-23-2019 at 03:51 PM. Reason: Price Increase
    1969 Chevy Panel, 250 CID, 3 Spd.with OD, 3.36 "WedgieVan" Daily Driver
    1967 Chevy Panel, 230 CID, 3 Spd. 3.36 "UtiliVan" 292 TFI coming. Owned since 76
    1964 GMC Panel, 194 CID, 3 Spd. "CrunchoVan"
    1965 GMC HandiBus Custom, 194 CID, 3 Spd. "MilkVan" Seized Engine
    1965 Chevy Panel 350 CID, 3 Spd. "RustoRoof" Runs but wiring bad
    1969 Chevy 108 Display 307 CID THM 350 Power Brakes 3.73 Posi
    1965 Chevy Panel, V8, 3 Spd. "Gold Hills Van" Best body of my 65s
    1965 CamperVan, V8, 3 Spd.

  8. #8
    Certifiable Vanatic RAY68108's Avatar
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    It took a lot of time, wheeling and dealing. A friend picked this up for me today. I should have it in my hands in a couple weeks. Man, I love overdrive, now Ill have stick/4 spd/overdrive...does it get any better? Once I have my hands and eyes on it, Ill be looking for the trans mount. Ray
    68 108 panel parts donor
    69 108 sportvan deluxe 350 4bbl 700R4 3:36 posi
    68 108 sportvan custom 350 4bbl 700R4

  9. #9
    VCVC Member
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    Which 4 Speed?

    Ray
    I can't remember which 4 speed that was. How many rings on the input shaft? Do you have a 4 speed column or will you be doing an add-on cable for reverse engagement? Also, on your van, what's going on underneath near the trans? Do you have dual exhaust?
    108VanGuy...
    1969 Chevy Panel, 250 CID, 3 Spd.with OD, 3.36 "WedgieVan" Daily Driver
    1967 Chevy Panel, 230 CID, 3 Spd. 3.36 "UtiliVan" 292 TFI coming. Owned since 76
    1964 GMC Panel, 194 CID, 3 Spd. "CrunchoVan"
    1965 GMC HandiBus Custom, 194 CID, 3 Spd. "MilkVan" Seized Engine
    1965 Chevy Panel 350 CID, 3 Spd. "RustoRoof" Runs but wiring bad
    1969 Chevy 108 Display 307 CID THM 350 Power Brakes 3.73 Posi
    1965 Chevy Panel, V8, 3 Spd. "Gold Hills Van" Best body of my 65s
    1965 CamperVan, V8, 3 Spd.

  10. #10
    Certifiable Vanatic RAY68108's Avatar
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    it is a 3 spd, no ring input shaft trans. I have the 4 spd no ring input shaft trans, 4 spd column with reverse. I will swap the OD from the 3 spd onto the 4 spd. I would like to mount the trans to the original frame mounting hole. The ultimate goal is to make it a lowered utility/shop vehicle. Its on the back burner for now. I just wanted that trans in my hands...not let it get away. The seller claimed there has been a lot of interest but nobody wanted to make the trip to get it and he wasn't willing to ship it.
    When the time comes, I will be selling the 3 spd with the original tail stock/trans mount. Ray
    68 108 panel parts donor
    69 108 sportvan deluxe 350 4bbl 700R4 3:36 posi
    68 108 sportvan custom 350 4bbl 700R4

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