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Old 03-28-2018, 08:20 PM   #1
Bentbolt
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Converting 4l60 4wd to 2wd

Sorry can't find the old post. I have the4l80e 4wd to 2wd post but what options do I have for 4l60e tranny to swap 4wd to 2wd drive? Here in Iowa the 4wd are everywhere 10:1 compared to the 2wd models. I found 5.3 but guy won't split it from tranny and tcase. I was wondering if I could just unbolt the tcase and mount a end cap. My truck has 2pc drive shaft. I been reading online & FB different places one person says can't be done but the next guy says he didn't but don't have info if how to do it.

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Old 03-28-2018, 10:06 PM   #2
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Re: Converting 4l60 4wd to 2wd

http://67-72chevytrucks.com/vboard/s...d.php?t=532654

Clinebarger has a nice write up in this post.
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Old 03-28-2018, 10:29 PM   #3
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Re: Converting 4l60 4wd to 2wd

Pull front pump first set of clutchs, remove snap ring output shaft will fall out, instal 2wd outputshaft and tail housing no other way
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Old 03-29-2018, 01:25 PM   #4
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Re: Converting 4l60 4wd to 2wd

thanks, I have never opened a tranny up before but have put several small blocks together. is this a cut and drop job you would say?
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Old 03-31-2018, 08:09 AM   #5
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Re: Converting 4l60 4wd to 2wd

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thanks, I have never opened a tranny up before but have put several small blocks together. is this a cut and drop job you would say?
Piece of Cake.... had to add "YOU TUBE IT"

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Old 03-31-2018, 01:09 PM   #6
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Re: Converting 4l60 4wd to 2wd

There are a couple really important steps that if you do them wrong it won't go anywhere or make a mess.

No real special tools needed. What year transmission? '96 and newer have a bolt-on bell housing that you might have to buy a special socket to remove.
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Old 04-07-2018, 07:13 PM   #7
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In the pic will show the removalable bell housing on the 4L60E transmission
You will need a harden torx head bit to remove the bell housing bolts. If it is not harden you will break the non harden torx.
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Old 04-07-2018, 07:21 PM   #8
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Remove the o-ring on the input shaft, in the pic the o-ring is on the bench.

Remove the pan off the transmission
Remove the filter

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Old 04-07-2018, 07:34 PM   #9
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Next remove the PWM sensor located by the TCC solenoid by using a small screw driver and pull out the clip that holds the sensor in the VB. This must be done to allow access to the two 10 mm bolts that hold the TCC solenoid to the case. Once the sensor is removed, remove the 2 10 mm bolts holding TCC solenoid. Pull the TCC solenoid out of the pump
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Old 04-07-2018, 07:42 PM   #10
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Once TCC solenoid is removed.
Remove the pump bolts. If you have the input sensor this will need to be disconnected prior to removing the pump.
Pump is ready to be removed from trans case.
To change out the output shaft the VB DOES NOT need to be removed from the Trans case.

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Old 04-07-2018, 08:00 PM   #11
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If you do not have a pump puller which most people reading this will not have you can simply pry the pump out of the case with a screw driver. But be careful. Don’t go crazy prying against the case. In this pic you should notice there is no pump body o-ring, this is a 2007 model 4l60e which has a wedge seal that fits into the trans case.
Continue to pull pump assembly out of the trans case
(To the left in the pic, you will notice the connector for the input sensor which I mentioned in a previous post) "make sure you disconnect this connector prior to removing the pump" only if you have this....

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Old 04-07-2018, 08:47 PM   #12
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Next remove the 2/4 servo assembly
Remove the snap ring holding the servo cover. There are two places in the case which will allow you access to this snap ring. Simply use a screw driver and pry up on this snap ring and remove it
Use a set of channel locks and twist the cover out far enough to have access to the cover o-ring, take a small screw driver and get under the o-ring to cut the o-ring (see pic) pull on one end of the o-ring to remove the o-ring from the cover. Once O-ring is removed. Pull the servo assembly out of the trans case
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Old 04-07-2018, 09:01 PM   #13
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With the 2/4 servo assembly removed this will make it a bit easier to remove the reverse input drum and the input shaft as one piece. Take a screw driver and push the 2/4 band off the anchor pin holding the band around the reverse input drum. Pull out the two drums mentioned above (during this activity make sure the trans is sitting on the bench with the VB facing up, this helps with accessing the anchor pin area)
Remove the 2/4 band out of the trans case
At this point you will have access to the snap ring holding the front planet to the output shaft.
With a good set of snap ring pliers remove the snap ring holding the front planet onto the output shaft.
Pull the front planet off the output shaft....

At this point you can pull the output shaft out the back of the trans case.

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Old 04-07-2018, 09:33 PM   #14
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To make it easier to pull the output shaft and to install the 2wd output shaft You can pull out the 3/4 clutch hub, sunshell, and sun gear. Leaving the center support/low and reverse clutches/rear planet and ring gear in the trans case.

In the first pic below, you will see the 4x4/2wd output shafts, snap ring, front planet, 3/4 clutch hub, sunshell removed and on the bench....

In the second pic the center support is left in the case.


Dive in everybody......got pics....

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Old 04-08-2018, 09:50 AM   #15
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in the pic below shows the difference in a 4x4 and a 2wd output shaft. The longer shaft is for a 2wd.
Hope this helps. If you want more on assembly of the trans I can provide the information along with pics if anybody would like. If you are unsure of the condition of the clutches and other parts, you may want to inspect them before reassembly.

Items to gather up before reassembly:
Tail housing to fit the 2wd option, along with new bushing, case to tail housing o-ring and seal
Front pump gasket, o-ring,seal,bushing (wedge seal, depending on year of trans)
2/4 servo cover o-ring
pan gasket and filter
There are o-rings on the pump bolts along with the input shaft o-ring, TCC solenoid o-ring...(these o-rings come in the rebuild kit, maybe bought separate from a trans parts store)

Depending on condition of trans, you may want to buy a rebuild kit and go thru it for ease of the mine......along with a shift kit....where do we stop ? Do it right...

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Old 04-08-2018, 10:33 AM   #16
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Re: Converting 4l60 4wd to 2wd

Good info. I just want to add the torx tool for removing bell housing is a “T-50 torx plus”
A common torx 50 will not work.
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Old 04-08-2018, 11:32 AM   #17
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The pic below shows the difference in 2wd/4x4 shafts for a 700r4 and the 4L60E

You can use a 700R4 shaft in a 4L60E but you CAN NOT use a 4L60E shaft in a 700r4. The reason why is .....look at the shafts in the pic you will notice the 700r4 shafts have the gov provisioning in the shaft
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Old 04-08-2018, 11:48 AM   #18
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Re: Converting 4l60 4wd to 2wd

Thanks pics help me a lot.
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Old 04-08-2018, 11:59 AM   #19
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Re: Converting 4l60 4wd to 2wd

Quote:
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Thanks pics help me a lot.
Your welcome. If you need additional information just ask. Have Fun !!
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Old 04-08-2018, 11:14 PM   #20
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Re: Converting 4l60 4wd to 2wd

Are all years 700R4 output shafts the same?
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Old 04-09-2018, 10:40 AM   #21
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T Question

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Old 04-09-2018, 10:48 AM   #22
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Quote:
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Are all years 700R4 output shafts the same?
No. There are 4x4 shafts which are shorter than 2wd output shafts. Plus I haven’t measured every output shaft out there so I can not say yes to your question One needs to ensure the tail housing matches the length of the 2wd output shaft.
Plus you have company’s out there making special length output shafts like advance adapters For an example, the 700r4 being installed mating up with a np205. The output shaft is shorter than the factory GM 4x4 700r4 output shaft

As far as the output shaft itself, if you look at it from the "Trans case bushing" towards the front planetary they are all the same. From the Trans case bushing area to the other end of the shaft they are different.

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Old 04-09-2018, 11:47 PM   #23
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Re: Converting 4l60 4wd to 2wd

Yes I understand the 4wd shaft versus 2wd shaft differences. So basically if one were to convert a 4wd 4L60E to 2wd, as long as you use the 2wd output shaft and the tail housing from the same 700R4, it should work?
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Old 04-10-2018, 07:49 AM   #24
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Re: Converting 4l60 4wd to 2wd

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Originally Posted by Captainfab View Post
Yes I understand the 4wd shaft versus 2wd shaft differences. So basically if one were to convert a 4wd 4L60E to 2wd, as long as you use the 2wd output shaft and the tail housing from the same 700R4, it should work?
4wd 4L60E to 2wd using the 2wd output shaft and tail housing from "same 700r4"
Should work, but....

depends on the year of the 4L60E, in the post's above show a 2007 model 4L60E which has a 6 bolt pattern tail housing but a 700R4 tail housing will not work since all 700R4 tail housing were only a 4 bolt pattern. Just making this clear for all readers...
I believe corvette output shafts are a bit shorter than the normal 2wd output shafts
Maybe a thread needs to be created showing 4L60E/700R4 differences..

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Old 04-11-2018, 12:38 PM   #25
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Here is for 700r4 output shaft differences. Thanks to ATSG:
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This is for factory designed 700r4 output shafts not including aftermarket output shafts

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