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I am going to offer this observation on the 97-98 swap.I am in the process of swapping a one piece bell housing 4l60e that was in my '98 suburban for a two piece bell housing 4l60e out of a '97 K1500 pickup. The trany cases are different lengths from the bell housing to the rear of the case between these two tranys. BUT the over all length from the bell housing to the T case mounting surface is within 1/8 of one inch of each other. They share the same cross member position,the same trans mount and the same997 will directly interchange with each other (98+ use a six bolt ext housing so prob wont work with your tcase) but buying a used 4L60e is a massive gamble. Just pull yours out and have it rebuilt by a reputable shop.
You're welcome, @dasburb....@NickTransmissions
First off--thank you for your thoughtful reply. I really appreciate the input and have decided to rebuild the transmission.
That said, I've decided going to do it myself + along with a friend who is an expert (engineer + worked in a shop for several years). We've both watched the transmission bench 4L60e series, and will be rebuilding it along with a re-watch of those videos (and with ziploc bags instead of a small parts box).
This may read like something along the lines of "he who is is own lawyer has a fool for a client" but I'm about to move do a different place where I'll have access to a garage and the space to properly and carefully do a two-table rebuild. I also think it makes the most sense especially if I want it done right/the way I'm really looking to do it.
A couple more questions:
1. Is there anything in those transmission bench videos they get wrong or any steps that you have felt are particularly tricky/counterintuitive?
2. I'm considering the going out and getting the Sonnax Heavy Duty 'durability' upgrades vs some kind of performance upgrade: my stock 5.7 ain't going anywhere fast. The upgrades they listed are:
Do you think those components would cover a transmission which would last a very long time? are they overkill? are there any components you think are missing? are there any which you think are unnecessary? Is there something better for durability? would love a lil guidance if you can give any
- Performance Pack HP-4L60E-01
- SmartShell® Heavy Duty Reaction Shell Kit 77749-02K
- Heavy Duty 3-4 Clutch Backing Plate Kit 74140-01K
- Rear Stator Support Bushing 77002BT-01
- 4th Gear Super Hold Servo Kit 77767K
- 2nd Gear Servo Kit 77701-02K
- Heavy Duty 2-3 Shift Valve 77754-41
- Optional Heavy Duty Remanufactured Valve Body GM053-HD or GM054-HD Learn More
TIA for the input!
Check the extension housing bolt patterns between the two...The one piece cases have four bolts for the T-case adaptors just like a 700R4 while the two-piece cases have six. So either will work as long as they both bolt to whichever Tcases that are intended to be used.I am going to offer this observation on the 97-98 swap.I am in the process of swapping a one piece bell housing 4l60e that was in my '98 suburban for a two piece bell housing 4l60e out of a '97 K1500 pickup. The trany cases are different lengths from the bell housing to the rear of the case between these two tranys. BUT the over all length from the bell housing to the T case mounting surface is within 1/8 of one inch of each other. They share the same cross member position,the same trans mount and the same
t- case to adapter gasket.
Both the dual range floor shifted T case and the dash mounted push button tcase have the same bolt pattern,Check the extension housing bolt patterns between the two...The one piece cases have four bolts for the T-case adaptors just like a 700R4 while the two-piece cases have six. So either will work as long as they both bolt to whichever Tcases that are intended to be used.
Yea im not familiar with all the diff transfer cases as i hardly ever see those but if it bolts up, its good.Both the dual range floor shifted T case and the dash mounted push button tcase have the same bolt pattern,
TO LATE!Yea im not familiar with all the diff transfer cases as i hardly ever see those but if it bolts up, its good.
I would do a couple things to the replacent transmission before you stab it...
Its never too late.TO LATE!
I did drop the pan and replace the filter and gasket and I changed the shift shaft seal.Its never too late.