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Transmission poll

Which transmission?

  • 700r4

    Votes: 21 30.4%

  • nv4500

    Votes: 26 37.7%

  • other

    Votes: 16 23.2%

  • nekkid and dont care

    Votes: 6 8.7%
  • Total voters
    69
neverendingproject

neverendingproject

1/2 ton status
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Im going to need a new transmission soon as mine is mostly stock and ive got a 383 in front of it. I would like some honest opinions on what transmission should be next.

I have 3.73's and I would like a nv4500 but they cant be found, and a guy can rebuild a 700r4 with EVERYTHING for a fair price.

I found a place where I can get the 4500 used for 700 and and the 700r4 new and super-built for about 700-800.

My only considerations is getting a different bellhousing for the 4500 and making new crossmembers or shell out money and "hope it doesnt break" for the 700r4.

or are there any other suggestions?
 
If you decide to go with a 700R4.............
IMHO dont rebuild the 700R4 if it is the orginal one that came in your truck. I am assuming were are talking about the 700r4 in your 84 K5 listed in your bio.
The old 700s had many weaknesses that rebuilding and even beefing up wont cure. You need a 88 or newer tranny. They had beefier stronger parts better pumps and internal changes to fix the problems with the older units.
IMO your best options are:
To get a tranny from Bowtie overdrives as said in above post.
Or
Buy a new 700r4 (4L60) from GM.
or
Find a 88+tranny at a junkyard and have it rebuilt/upgraded.
I would not waste any money having aan older model 700 rebuilt.
Also
Be sure to get a new torque convertor and flush out the trans cooler/lines
 
I'd go with the SM465, but it has no OD, so NV4500 is your best option.

I wouldn't even consider a slushbox. You will not regret having a stick, no in a million years. :)
 
id say go with the sm465 if od isnt a biggie... nv4500 otherwise

cant beat the control and dependability of a manual
 
neverendingproject said:
Even if I went with the 700, what stall speed should I go with?
Click to expand...

What cam are you running? Your cam usually determins the stall speed for best performance. In a 4x4 i would go the lowest recomended stall.
 
Thunder said:
What cam are you running? Your cam usually determins the stall speed for best performance. In a 4x4 i would go the lowest recomended stall.
Click to expand...

Im running gmpp 383 cam which is supposed to make over 400 lb-ft from 2500rpm on up.
 
I just talked to the trans. guy and he said he could do a 4l80e for a little less than the 700 but it would be a manual valve body ( no electronics), so this is now an option.
 
i'm looking for an nv4500 myself. they are so dang expensive. i live in southern california and all the transmissions are out of state it seems (well, on ebay). i havent seen one below 1200 rebuilt. the conversion kit for a 205 ten spline is about 1000 also. maybe ill just have to start picking my money tree in my back yard....j/k. anyone with experience building a trans crossmember? what kind of mount should i use for an NV4500? thanks to anyone who knows.
 
neverendingproject said:
I just talked to the trans. guy and he said he could do a 4l80e for a little less than the 700 but it would be a manual valve body ( no electronics), so this is now an option.
Click to expand...

Do a search on the manual valve body. I read they can be a PITA to install right. If you have the right transmission guy and get past that, the shifts may be somewhat rough. If that is OK with you then, you may need a floor shifter to make the shifts. Manual valve body + Install + Shifter = close to what a TCI controller is. CompuShift controller sounds better than a TCI. What does all this mean? 4L80E can be an expensive choice. But then again so can the NV4500. I opted for the 4L80E with the compushift.

Oh yeah, and there are the driveshaft lengths to look into. Some times keeping it simple is the best option. If you have the 700R4, a built one might be the best bet.

My $.02
 
Actually, I went with the computer option. There is more tuning I have to do cause it acts wierd sometimes, but overall, its kicks some serious a$$. I love the 4l80e and not ever having to worry about a higher HP motor breaking it is an amazing feeling.

Btw I ended up getting the rebuilt and enhanced 4l80e for free, and I only had to buy the controller.
 
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