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Going sm465

C

Camaronate

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Posted in GM diesel, decided it would be better here.

Man, 4th 700 in 3 months, Forget the 700, going sm465.
I found one today, complete setup from a 1988 burb, crossmember pedels and all.
I just did the 6.2 swap a few months ago and havent been able to get 300 miles out of the transmission.
Is there anything I should know before getting into this swap?
From what I have read I will need the driveshafts reworked but eveything else looks like it would be a direct swap into my 83 k5. Will also need a new flywheel and clutch.

Am I missing anything?

Nate
 
I'm just finishing up a swap from a TH400/205 to a 465/203/205, and here's what I found

An NV4500 is a great swap, but prepare to pony up some $ to do that swap. 465's are a dime a dozen.

You'll have to swap in the pedals, and drill holes to mount the clutch master cyl, you'll need a flywheel & clutch assembly, the bell housing, the bell housing dust-shield, and adjustment of the drivelines because the 465 is shorter.

Fun fact, a 465/203/205 is only 3" longer than a TH400/205

Here's my build thread.

I haven't updated it in a while because I haven't taken pictures. I'm in a time crunch and just haven't taken the time to get pictures as I'm going. I've got the tranny, and cases in, have the rear crossmember in and just finished the front crossmember tonight.
 
Camaronate said:
Posted in GM diesel, decided it would be better here.

Man, 4th 700 in 3 months, Forget the 700, going sm465.
I found one today, complete setup from a 1988 burb, crossmember pedels and all.
I just did the 6.2 swap a few months ago and havent been able to get 300 miles out of the transmission.
Is there anything I should know before getting into this swap?
From what I have read I will need the driveshafts reworked but eveything else looks like it would be a direct swap into my 83 k5. Will also need a new flywheel and clutch.

Am I missing anything?

Nate
Click to expand...

I'm curious - where are you getting your 700's?
 
The first ones were used, didn't last very long at all but I got em cheap.
I had a buddy build the last 2 on the side after i did the diesel swap. He has built a ton for people all over town, mostly for 1/4 mile cars. I think the parts supplier for the pump is having a problem. Im just tired of pulling it. I can get it out in 47 minutes now but its alot of work to keep doing it.

The problem is if I take it somewhere else now Im out even more money and it may or may not work, then for how long.

After looking through some old threads it looks like the nv3500 might be they way to go. found one a few miles down the road for 500 at a junk yard but I should be able to find one cheaper.

Also thought the manual would be the way to go since I will not be driving it very often due to the million dollar a gallon diesel.
 
I have no problem with a manual swap - I plan on doing one as well. It's just that a lot of people P&M about the 700 after a junkyard tranny blows up :rolleyes: It sounds like you need to have your "buddy" fix the thing right. You can't hardly blame the tranny if someone does a poor quality rebuild or uses crappy parts...
 
I dunno, on one hand I agree the builder should be taking care of you. On the other hand I don't know why GM ever stuck a 700R-4 in a 4WD Suburban in the first place (or 10 bolts for that matter).

I ran the 465 behind a 6.2 in my K5 for 4 years, then chucked an NV4500/203/205 behind the same 6.2 about 18 months ago.

I'd go SM 465 or NV4500...but I would never swap in an NV3500 unless you really do like swapping trannies. It's weak, and the 6.2 isn't a powerhouse but would eat that tranny in a heavy apllication like a 4WD 'Burb.

Rene
 
did you swap the converter for the dizzle version when you put the 6.2 in?
 
Yea, I see your point on the 3500, kinda weak.
And yes, everything in the 700 was setup for the diesel. even the 6 lug 1397 stall converter.

The only thing about the 4500 is finding one. What year 4500 should I look for?

Nate
 
I would go with the 465 if you already have it. My local milage improved over the 700r4 when I did my swap.If the 465 is out of a 88 burb the your driveshafts will work. 1988 had the longer adaptor to a 208, and you should have the 208 on your k5. My k5 was a 89, and the donor truck was a 90 k1500. So my only problem was I had the wrong drop t-case, but they both were 241's so I just swapped input shalfs and t-cases. I used my stock drive shafts from the k5. The '88 burb would also have hydro clutch, go with the 465.
 
If you really want a 4500, there's a place in texas selling rebuilt units for a decent price. Just be prepared to bend over a chair when you have to go to the GM dealer and by $150 worth of gear oil for it.

www.smartpartsauto.com
 
Cost me $107 for lube for my NV4500 at the GM dealer....:doah:

Rene
 
Man, If the 465 from the 88 suburban will work in my k5 without swapping diveshafts im all over it. I guess I need to go measure it.

Nate
 
As long as it has the long adaptor on it your fine. If there is a 208 behind it, jut swap it in.
 
The 6.2 diesel has a narrow power range 600 - 2500(?) rpm. A gas V8 600 - 5000rpm. Would a SM465 be the best choise in this application? The SM465 is a wide range ratio, Would a NV4500 with its closer ratio and OD be a better overall choise for a diesel?
Just something to think about.
 
I would love the nv4500, but compare the costs and benefits. Just depends on what your ride is for.
Mine is really only used for back up vehicle and camping.
 
The 6.2 pulls hard right to 3600 rpm which is it's governed limit. I never had a problem with the SM 465 behind my 6.2. As for the NV4500 (I have that behind a 6.2 now) the ratios aren't any closer together, not enough to make a difference anyways. All it really has going for it is similar strength, similar crawler first gear, and an overdrive. Driveability is no different.

Unless I was messing around I never shifted over 3600 rpm with my smallblock, and can recall once where I hit the governor on the 6.2 just as I was about to shift.

Some diesels are very low rpm, but the V-8's aren't.

Rene
 
I think the diesel had different gearing in the axles to make up for the lack of high rpm's. I think the 465 is a wonderful tranny and aside from lack of overdrive, it is IMHO the best choice for truck use because of stoutness, low maintenace, low cost and wide variation to suit just about any setup. If you have the 465, throw it in there and be pleasantly surprised that the only thing you would swap it for is a 4500:D
 
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