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Old 12-22-2015, 09:03 AM   #1 (permalink)
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IDing a NV4500

Okay I know what they look like and what years they came in. But looking at pickup up one from a guy that has had it sitting in his garage for sometime. He says its from a 94 chevy.

What casting numbers, serial numbers, hard measurments or and cast webbing to be able to ID which NV4500 came from what specific vehicle and year that it came from.

I only ask because I am wanting the lower first gear from the 92-94 chevy years. Dont wanna be screwed in buying something that is a year off from what I need. And im pretty sure he wouldn't let me pop the top off a count individual gears.

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Old 12-22-2015, 09:12 AM   #2 (permalink)
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The early ones have a vertical bellhousing bolt spacing of 4 and 5/8ish.
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Old 12-22-2015, 09:32 AM   #3 (permalink)
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I know about the ID sticker on the shifter cover but thats an easy part to swap to make it look like the correct one. Really looking for something like TreeQuotaTon stated. What other hard measurments or castinf numbers are there to ID this thing.

2. NV4500 Transmission Identification | Tech Vault | Advance Adapters

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Old 12-22-2015, 10:03 AM   #4 (permalink)
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I have one sitting on the floor at the house. If nobody else chimes in, I'll take hard measurements and pictures for you.
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Old 12-22-2015, 10:27 AM   #5 (permalink)
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Cant you stick it in gear and count rotations? Kinda like a dif?
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Old 12-22-2015, 10:55 AM   #6 (permalink)
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Cant you stick it in gear and count rotations? Kinda like a dif?
That'll give you a fairly rough number. Not accurate enought since the two different gearing options were still somewhat close.
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Old 12-22-2015, 10:56 AM   #7 (permalink)
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I have one sitting on the floor at the house. If nobody else chimes in, I'll take hard measurements and pictures for you.
Would be much appreciated. If you want PM me and you can send them to me via text.
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Old 12-22-2015, 04:41 PM   #8 (permalink)
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Isnt it 6.5 vs 5.6?

6 rotations on input vs 5 shoud be prettyu easy to spot

Case is just a case you can put whatever shafts you want in either case
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Old 12-22-2015, 04:57 PM   #9 (permalink)
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94 and 95 will have the same bolt up but different 1rst gears.


Mark and count the shaft rotations.
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Old 12-23-2015, 05:18 AM   #10 (permalink)
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Quote:
Originally Posted by 79chevy39.5's View Post
Isnt it 6.5 vs 5.6?

6 rotations on input vs 5 shoud be prettyu easy to spot

Case is just a case you can put whatever shafts you want in either case
6.34 vs. 5.61 - so should be enough of a difference to notice.

Only the ’93 Chevies came with 6.34. The ’94 up Chevies and Dodges came with the 5.61. The 6.34 version also doesn’t have a syncro for first or reverse.
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Old 12-23-2015, 07:01 AM   #11 (permalink)
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Yeah, about 3/4 of a turn.....

5.6 will turn 5 times and the mark will land on about the 7:00 bottom side

6.3 will turn 6 times and the mark will land about the 4:00 rh side
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Old 12-23-2015, 07:06 AM   #12 (permalink)
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Novak always has pretty good info on transmissions

The Novak Guide to the NV4500 Transmission
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