[70bird]

What is needed to change the output shaft in a 700r4? I would like to mate a np203 (and later a np205) transfer case to a 700r4 that has an output for a np208.

Is a complete tear down required or can it be accomplished from the rear of the trans? Any special tools required?

[Pete Dow]

the output shaft in a 700 is to long must be take apart and a new shorter modified shaft installed to fit to the adapter for a 203,last time i purchased one it was approx.150 bucks local supplier.

[Crosley]

Originally Posted by 70bird

What is needed to change the output shaft in a 700r4? I would like to mate a np203 (and later a np205) transfer case to a 700r4 that has an output for a np208.

Is a complete tear down required or can it be accomplished from the rear of the trans? Any special tools required?

you must pull the pan , the filter , the lock-up solenoid.

then pull the pump.

then release the servo for the band to allow the band movement so the input drum can be removed.

then you are there. Pull the inner sun gear off the output shaft, remove the snap ring , output shaft falls out.

Are you getting a different shaft from Advanced adapters or similar place?

[70bird]

I am just gathering the necessary info so I know what I am getting myself into.

I just changed my gears from 3.73 to 4.10 which resulted in a noticable decrease in fuel milage.

I have been planning on going to OD and since my mileage has went down, OD has moved up on the list of things to do.

I have a buddy that has a 700r4case in a closet that he said I can have. But I am also looking for one complete for an assumed cost savings. This leads me to another question: What would it cost to build a 700r4 (in components and kit) having only the case to start with? A rough estimate would sufice. Maybe I'll post a new thread on that.

Advanced Adapters is one of the sites I have checked out for the shaft and adapter. I am also considering Off Road Design's NP-203/205 doubler setup. I just need to find a 205 lying around.

I'm sure there is more than one good thread for converting from th350 to 700r4. If you have one stored, please post a link.

[Crosley]

Originally Posted by 70bird

What would it cost to build a 700r4 (in components and kit) having only the case to start with? A rough estimate would sufice. Maybe I'll post a new thread on that.

you are better off to purchase a 1988 to 1992 4L60 complete core to build.

Trying to build up a 4L60 tranny from a bare tranny case is not something I would suggest for a novice DIY person.... IF that is your plan.

[70bird]

I thought the 4L60's are electronically controlled. Are the 88-92 non electronic?

Is the shifter location in the same spot?

Is the 4L60 longer, shorter or the same length as a 7004r? This is going in my '76 K-5 Blazer.

I've heard that the 60's are stronger than the 700's.

I am also converting from carb to TPI. Does the 4L60 hook-up the same as a 700 to a '92 TPI ECU?

What would need to be changed in a 4L60 to mate it to a NP203 or NP205?

Was the 88-90 4L60 installed in 88-92 4x4's?

Thanks for your insight.

[Crosley]

the 4L60 is the same tranny as a 700r4...... it was renamed by GM . Same length , same applications , same tranny......

NOW before the posts begin; YES the 4L60 was updated heavily in mid 1987 when the rename came about..... the internal parts are swappable for the most part IF you know what you are doing

A 4L60"E" is the electronic version , introduced in 1993 truck / van applications.

Many/most of the internal parts on the "4L60E" version are shared with the 4L60 a non electronic version

Originally Posted by 70bird

I thought the 4L60's are electronically controlled. Are the 88-92 non electronic?

Is the shifter location in the same spot?

Is the 4L60 longer, shorter or the same length as a 7004r? This is going in my '76 K-5 Blazer.

I've heard that the 60's are stronger than the 700's.

I am also converting from carb to TPI. Does the 4L60 hook-up the same as a 700 to a '92 TPI ECU?

What would need to be changed in a 4L60 to mate it to a NP203 or NP205?

Was the 88-90 4L60 installed in 88-92 4x4's?

Thanks for your insight.

[70bird]

So this pic from your journal must not resemble all 4L60s.

Click Here

My guess is this is for an aluminum block application.

Thanks for the great info.


Wait, where's the bell houseing?

[Jmark]

If my memory serves me, the 4L60E has a removable bell housing where as the 4L60/700R4 does not. Other than that, very similar.

[Crosley]

Originally Posted by 70bird

So this pic from your journal must not resemble all 4L60s.

Click Here

My guess is this is for an aluminum block application.

Thanks for the great info.


Wait, where's the bell houseing?

that is a 2005 trans as the photo is titled. That photo is a 2005 Silverado (new truck ) trans that was 'smoked' in a magazine shoot out done here in the metro Phoenix AZ area. The truck had a Magna-charger on it.

your guess is incorrect. The 3 piece case was introduced in 1996 or 97 in the small trucks ( S-10 type) with a 4.3 motor. I do not work on many V-6 vehicles, so I am not sure on the year of introduction of the 3 piece case. Perhaps Chazmac or airworld2 knows better.

here is a 1999 4L60E unit..... 3 piece case as the 2005 unit, but! they are quite different in converter , bell , input shaft areas

[Crosley]

Originally Posted by Jmark

If my memory serves me, the 4L60E has a removable bell housing where as the 4L60/700R4 does not. Other than that, very similar.

your memory has failed you........

4L60E was introduced in the van & light trucks first.... 1993

Vettes and "F" body cars had a non electronic 4L60 tranny.. most were round 5 pin connector in place of the square 4 pin type most folks know of.

I guess we sorta got off the main topic here, although I hope his question was answered.

[Chazmac]

S & T trucks had removable bell in 1997, late.
1998 is the accepted start of 3 piece (removable bell) case.

4L60 was used in Typhoon and Syclone also...

[70bird]

I was helping my buddy move the other day and I checked out the 700r4 he said I could have. It's not just the case, it is complete. However, it is for a 2wd.

It is unknown what year vehicle it is from.

Questions:

How easy would it be for a DIYer to rebuild the 700r4 and are any special tools required? I know I've seen rebuild videos available and I will be taking my time on the rebuild.

Is the rebuild kit the same for all 700r4's and 4L60's?

Any recomendations on a good quality rebuild kit? I usually order through Summit. This will be going in my 5100lb+ '76 K-5 Blazer with a mild 300hp+ 350.

What can/should be changed in order to make this a stronger unit?

How about this kit: To Summit
I noticed it is for 87-93's? I like the manual valve body conversion.