Granny Low 4spd. Identification - The 1947 - Present Chevrolet & GMC Truck Message Board Network

19GMC63 · 01-09-2007, 10:41 PM

Hey guys, I was wondering if someone could help me identify the manufacturer of the 4spd. in my GMC. I know its not the original tranny, because there still is a column shifter on the steering column. (unless column isn't original)
All I can tell you is reverse is to the right on the shift pattern. I also see two electrical connection thingys towards the front of the tranny. Have no idea what that is. (reverse lights?) There are a few casting numbers, kinda hard to see, I also see a "GM" stamp.

thanks for your help.

rwgregory · 01-10-2007, 02:59 AM

It sounds like you have a 1966 or newer New Process 435 4-speed trans. Yes that 2 wire thingie is a hookup for reverse lights.

Fred T · 01-11-2007, 12:32 AM

This page should help.
http://www.novak-adapt.com/knowledge...on_gateway.htm

19GMC63 · 01-11-2007, 12:55 AM

cool, thanks for the link.
Judging from the pics and info, i'm positive this one is a SM-465.

So how to I make use of that reverse light switch? Just run a power wire, then run the other to the backup light?

Fred T · 01-11-2007, 06:38 PM

Yep. Tap off the fused ignition, so you don't run the battery down.

01-09-2007, 10:41 PM	#1
19GMC63 Registered User Join Date: Nov 2006 Location: Nashville, TN Posts: 1,510	Granny Low 4spd. Identification Hey guys, I was wondering if someone could help me identify the manufacturer of the 4spd. in my GMC. I know its not the original tranny, because there still is a column shifter on the steering column. (unless column isn't original) All I can tell you is reverse is to the right on the shift pattern. I also see two electrical connection thingys towards the front of the tranny. Have no idea what that is. (reverse lights?) There are a few casting numbers, kinda hard to see, I also see a "GM" stamp. thanks for your help.

01-10-2007, 02:59 AM	#2
rwgregory Registered User Join Date: Apr 2005 Location: Chula Vista, California Posts: 495	Re: Granny Low 4spd. Identification It sounds like you have a 1966 or newer New Process 435 4-speed trans. Yes that 2 wire thingie is a hookup for reverse lights. __________________ rwgregory 67 GMC 2500 ,2w/d wide box 305 V-6, 4-speed

01-11-2007, 12:32 AM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: Granny Low 4spd. Identification This page should help. http://www.novak-adapt.com/knowledge...on_gateway.htm __________________ Fred There is no such thing as too much cam...just not enough engine.

01-11-2007, 12:55 AM	#4
19GMC63 Registered User Join Date: Nov 2006 Location: Nashville, TN Posts: 1,510	Re: Granny Low 4spd. Identification cool, thanks for the link. Judging from the pics and info, i'm positive this one is a SM-465. So how to I make use of that reverse light switch? Just run a power wire, then run the other to the backup light?

01-11-2007, 06:38 PM	#5
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Re: Granny Low 4spd. Identification Yep. Tap off the fused ignition, so you don't run the battery down. __________________ Fred There is no such thing as too much cam...just not enough engine.

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