The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1947 - 1959 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 12-26-2014, 04:05 PM   #1
G&R's57GMC
Senior Member
 
G&R's57GMC's Avatar
 
Join Date: Aug 2010
Location: Shasta Lake, CA.
Posts: 1,624
Re: NAPCOs with Automatic Transmissions?

The NAPCO conversion could be installed on any truck with whatever was on the truck.

So yes you could have a NAPCO with 3 on the tree, with or without O.D. , 4 on the floor or with a Hydramatic .

BTW the Hydramatic does have Park, to engage it you would put it in Reverse and when you turned the key off the PARK plunger would engage .

Does this seem odd to you today ?

Well back in the day it was common practice to put a MANUAL trans in Reverse when you parked.
So it wasn't a far stretch for GM to have the driver put the Hydamatic in Reverse.

Generally Reverse was the lowest gear in a manual trans and it would have a harder time turning the engine against compression.

More then a few vehicles ran away on hills when the driver didn't also set the parking (emergency) brake.
__________________
Glen & Jane's Rides
‘57 GMC NAPCO Long Bed V8 4 speed Bought 2008
7 other cars & trucks , 5 trailers
'56 Chevy Long Bed I6, 4 speed Bought 1990 Sold 8.22.2020
’56 GMC Suburban Pickup V8, 4 speed Hydramatic Bought 1996 Sold 10.11.2020
My Other Tinkerings http://67-72chevytrucks.com/vboard/s...75#post8967275

Last edited by G&R's57GMC; 12-26-2014 at 04:26 PM.
G&R's57GMC is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 08:41 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2025, vBulletin Solutions Inc.
Copyright 1997-2025 67-72chevytrucks.com