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Old 02-05-2006, 08:04 PM
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Towing a Nailhead/turbo 400, 1994 yr

Have a Nailhead with a turbo 400 (2 speed 1994vintage) automatic transmission. in our Hot Rod. I would like to know if this unit is tow-able behind our motor home, or will I have to remove the drive shaft?
Anyone know that much about the early turbos?
Help!!
Nailheadforty

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Old 02-05-2006, 08:42 PM
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Turbo 400's were never 2 speeds. DO NOT TOW AN AUTOMATIC WITH THE DRIVESHAFT ATTACHED TO THE DIFFERENTIAL!
When you do this the planetary is turning inside the trans. Because the pump is not turning, there is NO lube oil being fed to the rotating parts. The trans will fail, burn up, die and leave you. Even transmissions made with rear pumps cannot be towed. The rear pump was designed as a push start feature, not a towing feature.
There are external kits made for towing applications that do lube the trans. Be sure you understand how they work.
I personally like the kits that disengage the driveshaft by using a sliding collar.
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Old 02-06-2006, 07:02 PM
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Towiing that Nailhead

CHAZMAC: Thanks for the info. I knew someone would would have the answer.
You really have me wondering about that Turbo 400. The thing is in storage now for winter. But I was certain it just has a Low & Drive feature. Could be all in the shifter not letting it go into a deeper gear. Its an aftermarket floor unit. I will put that on to do list once the weather warms. Thanks again friend.
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Old 02-06-2006, 08:04 PM
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The TH-400 ended production in 1990 and was always a 3 speed automatic, (Actually they changed the name to 3L80 in 1990). If you truly have a two speed automatic I suspect it might be a powerglide.
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