[aushiedog]

Probably should have placed this before in this section. In need of a gear vendor overdrive for a turbo 400 in a 66 GTO.

[er455]

I have a Doug Nash unit that is new but might be missing the adaptor piece and the switch

[TimeWarp]

Have one in my GMC truck, and my son has one getting ready to go into his 73 trans am. I bought one off this forum not long ago, but they rarely come up...almost never in fact. One place to check is of course ebay, but another is to use something like Searchtempest.com to do a regional craigslist search. Set it to search surrounding craigslists as far as you want to search. Good luck.

[floffy]

You can also look for a laycockmunit used in volvo's is the same as a gear vendor.

[my69brd]

I have one for a TH350
You just have to replace the input adapter for the TH400 one.

[my69brd]

I have a GV for sale - It fits a TH350 - you would have to get the TH400 adapter from GV








PM me

[aushiedog]

Can you send me a message that will somehow get to my son who has the 66. I could have him contact you.
Thanks
Ken

[rexs73gto]

If he doesn't take it can you please let me know & we can then talk about the unit to, as I would like to put one of these in my car. How much are you asking fro the unit. ???

[Speed Racer]

How much for the overdrive to fit a T350 ??????????

What ratio O.D. ??

[imposter]

I'm interested as well

[my69brd]

Originally Posted by aushiedog

Can you send me a message that will somehow get to my son who has the 66. I could have him contact you.
Thanks
Ken

Sent you a PM

[TimeWarp]

If the my69brd does not have the electronic controls for that unit the buyer can use a manual switch to turn it on and off, but you don't want to have it on at low rpm (under 1200 or 1400...cant remember) because it will burn the clutches up. So...forget and leave it on...then take off from a light and you'll smoke it. The electronics prevent this from happening by turning it off when you slow down or stop, then turning it back on automatically later after you accelerate.

The electronic controls can be purchased from Gear Vendors of course, but I also know another source for a few $ less. I can look though my stuff and find it if anyone needs it.

[my69brd]

Electronics, Parts, and Adapters
I only have the unit $500

http://www.maximum--overdrive.com/products.html

[TimeWarp]

Yes, that's the guy I meant. Very nice and knowledgeable. Cheaper than Gear Vendors themselves too.

[Sirrotica]

If that guy can sell his parts for what he's getting for them, then GV is making a killing on their stuff.

All the drawbacks that the GV/Laycock unit has I made my decision a long time ago to use the mostly trouble free 4L80E. They both need electronic controllers to be used automatically. Everyone always says they want the GV unit because the 4L80E needs an electronic control module, so does the GV unit. I also don't have to change fluid in my 4L80E every 5,000 miles. The deep finned pan the guy is selling is because heat is a definite factor in the GV/Laycock unit.

If you run it with a manual switch and forget to turn it off when you come to a stop, or put it in reverse, it's going to smoke the clutch immediately. The GV unit connected to a T400 also is larger overall than a 4L80E.

The 4L80E is proven since 1991 in GM HD truck applications and uses about 75% T400 guts, It can take as much abuse as any T400 can and has a built in OD. The 4L80E can also use the aftermarket TCM to make adjustments to the shift points and hydraulic pressures on the fly. You can't do that with any GV/T400 unit.

I'm not trying to change anyone's mind, but I did a lot of research on auxiliary OD units compared to a 4L80E and the 4L80E is the winner in my book, hands down. Plus I own a 1993 K3500 dually with a TD 6.5 and know how tough these transmissions are. 248,000 miles on it and it will pull/haul anything I ask it to. I use it regularly to haul a 35' Holiday Rambler fifth wheel camper.

[imposter]

enough said i'll pass but thats a great deal what about the new/old honeodrive units