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swapping NV4500 for 465

beater_k20

beater_k20

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what would it take to put a NV4500 in place of a 10 spline 465? would i be able to use a 465 bellhousing to do it? i know i'll have to modify or replace the 205 that is behind it. i'm thinking of trading my 91 K1500 for a '79 K20 with a 465/205 and 4" of lift on it. the only thing really holding me back is the fact that it isnt an OD truck, so its gonna be pretty rough on gas compared to my OD/3.42 gears i'm used to. i know i can go hydro clutch in the 79 no problem, but i'd just like to have that extra gear. BTW the plan for the truck is a DD/tow rig.
 
I know there has been a few posts about this.

The 465 bellhousing won't work, you need a new one, or an adapter plate. As for as modifying the 205, AA sells adapters to mate the 205 to the 4500 along with bellhousings.
 
looks like the adapter is a bad idea due to high price. any ideas what i would take to make a stock GM 4500 bellhousing work with a hydro clutch?
 
Get the GM bellhousing that came with hydro clutch. Theres 2 differrent ones, internal and external slave. Or get the adapter for the slave on a non hydro bellhousing, dont know if they have one for tha bellhousing though.
 
I put the 5 spd in my 87 crewcab,used a 97 c20 4500 tranny,used the 208 tcase,bolts right up to the 4500 with out any adapter,using the 97 bell housing and internal slave cylinder, put the pedals and master cylinder out of the 85-87 truck and plumbed together.
Easy as that !!!
Also, the older bell housing wont work, the bolts dont line up to bolt the bell housing to the tranny,
A 205 tcase might work out of the 84 and newer 4spd's if they have the round adapter plate, no the race track looking one.
Happy hunting !
 
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97 c20 4500 tranny,used the 208 tcase,bolts right up to the 4500 with out any adapter,using the 97 bell housing and internal slave cylinder, put the pedals and master cylinder out of the 85-87 truck and plumbed together.

[/ QUOTE ]

so let me get this straight. you used a 97 2wd trans and bolted a 208 to it? and then used the 97 bell and slave cylinder along with the master cylinder of the 85-87 variety? i'm assumind the line you used was from the 97 too, correct?
 
You still have to use the 4x4 tranny, and use the bell housing from the 97 also,the hydraulic line from the 97 and then you have to mate(plumb,rig) to the 87 master cylinder.
 
so what year 205 or 208 is needed to put behind the nv4500? I have done a 2wd swap on my dually and the tranny has really helped my truck out. My sub is 4wd so I was thinking of the same thing on it if I could get a 205 to work, but I guess a 208 would handle some light towing also.
 
if you've got a 208, you might as well try to find a 241 that were real popular with them. But I think it might fit, just have to make sure all the splines and stuff match.
 
A 2wd tranny will work, in fact, if you do the AA route, you have to cut the 4wd mainshaft. If you dont want to buy adapters your best bet would be to run the 4500 and 241.
 
[ QUOTE ]
My sub is 4wd so I was thinking of the same thing on it if I could get a 205 to work, but I guess a 208 would handle some light towing also.

[/ QUOTE ] IIRC the t-case doesn't really play much of an issue when in 2hi. It would be fine for towing, an M1008 1 1/4 ton has a 208.
 
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My sub is 4wd so I was thinking of the same thing on it if I could get a 205 to work, but I guess a 208 would handle some light towing also.

[/ QUOTE ] IIRC the t-case doesn't really play much of an issue when in 2hi. It would be fine for towing, an M1008 1 1/4 ton has a 208.

[/ QUOTE ]

It doesnt play an issue at all.
 
CK5 Member




Reged: 01/27/03
Posts: 1784
Loc: Castro Valley, CA Re: swapping NV4500 for 465 [Re: Pookster]
#1253667 - 11/24/04 08:14 PM Edit Reply Quote



If you use a 2wd drive tranny then you will need some kind of adapter. Not sure why you would want to start with wrong part and try to make it work.

A 81-87 208 from a 400 tranny or a 4spd will work directly behind the 4x4 4500 WITHOUT any adapters. NO CUTTING !!
I am not sure what k5monsterchevy has ran into in the past but this will work,not sure what AA route is either (sorry)

The 241 wil work, but most have a electric speedo,again it has to be behind a 400 or a 4spd tranny, if yours is a 79 you will most likely want to stay with the 208, they have a cable speedo.
84-87 205 will work ( I think) behind a 4spd or 400, it must have the round adapter on it,,
As long as you have the right parts or can get them, you do NOT need to buy any adapters.
 
[ QUOTE ]

A 81-87 208 from a 400 tranny or a 4spd will work directly behind the 4x4 4500 WITHOUT any adapters. NO CUTTING !!
I am not sure what k5monsterchevy has ran into in the past but this will work,not sure what AA route is either (sorry)



[/ QUOTE ]

Well, I was talking about mating it to a 205, since thats the original question of the post! /forums/images/graemlins/waytogo.gif
 
So what year 205 will bolt to the round bolt pattern on these trannys? I was told that 85 and newer 205 on a 400 had a round pattern is this true? What is the spline count on the 4x4 nv4500 and the 205?
 
[ QUOTE ]
So what year 205 will bolt to the round bolt pattern on these trannys?

[/ QUOTE ]

Yes it will work. 85-91 behind a 465 or 400. Because of the problem with the spline engagement and shift rails, You either need a spacer plate or change the input, and modify the 4500 tailhousing.


[ QUOTE ]
What is the spline count on the 4x4 nv4500 and the 205?

[/ QUOTE ]

32 spline on the 4500, 10 on the 205 if it was behind a 465, but you can change the input. If it was behind a th400 32 spine female input. If it came behins a th 350, its a male 27 spline. WHat did the 205 come behind?
 
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Dude ?!
have you read anything at all that I have written.

[/ QUOTE ]

......YESS............ /forums/images/graemlins/thinking.gif, whats the problem? /forums/images/graemlins/dunno.gif I am putting in my info on mating it to the 205.
 
Does anyone have any pics of this or just the nv4500? I don't even know what one looks like so it makes it hard looking through the shelves at the junk yard full of trannys. Also would my stock np 241 behing the 700r4 work with the nv4500 or does it have to be an older 241? Thanks for your help, Im pretty sure this is the route I wanna go with this truck.

Alex
 
the 241 would work, but to have the correct spline's it
must come from behind a 400,or a 4spd,or 5spd tranny
 
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