4L60E Trany - The 1947 - Present Chevrolet & GMC Truck Message Board Network

dave69 · 02-26-2011, 02:41 AM

I have a 69 C10 with a 96 Vette LT4 engine and keeped the TH350 for now. Any thoughts on doing a swap from a the TH350 to 4L60E trany. I just got one giving to me, but I don't have any electronics or wiring and don't know the history of this trany. I was thinking of getting a 700R4 which I think is easier to convert. If you guys think the 4L60E is better to go with than please let me know what you think.

PanelDeland · 02-26-2011, 07:20 AM

The 4l60E is generally considered to be a stronger tranny and will probably live better behind that engine.They make "Stand Alone" wiring harnesses for it but they tend to be pricey.Also,not knowing the condition it might be a good idea to have it checked out before installing.You might talk to a couple of tranny shops,maybe you can make a trade or at least get the info to help you make an informed decision.

dave69 · 02-26-2011, 04:49 PM

Quote:

Originally Posted by PanelDeland

The 4l60E is generally considered to be a stronger tranny and will probably live better behind that engine.They make "Stand Alone" wiring harnesses for it but they tend to be pricey.Also,not knowing the condition it might be a good idea to have it checked out before installing.You might talk to a couple of tranny shops,maybe you can make a trade or at least get the info to help you make an informed decision.

Yes if I use it I will have it gone through and I know the stand alone stuff is pricey I will do that talk to some trany guys on what is best thanks

MARKDTN · 02-28-2011, 04:45 PM

Do you have an LT4 that is fuel injected or converted to carbureted? If it is fuel injected, you can just have the PCM changed to add the transmission controls. Someone like Street and Performance or Howell could help with reflashing and adding some wiring.

low'n slow · 02-28-2011, 06:05 PM

I did the same thing. We used Street and Performance to reflash the PCM and used their tailhousing to keep the stock speedo. It works good. I moved the engine back with 6 cyl mounts and used the stock auto linkage. Also changed the gearing to 3.73 from the 3.07 ratio.

dave69 · 03-01-2011, 12:09 AM

Thanks guys I had LT1 Swap do my ECU so I will call him. I am running EFI not a carb.

02-26-2011, 02:41 AM	#1
dave69 Registered User Join Date: Oct 2009 Location: pitt meadows bc Posts: 88	4L60E Trany I have a 69 C10 with a 96 Vette LT4 engine and keeped the TH350 for now. Any thoughts on doing a swap from a the TH350 to 4L60E trany. I just got one giving to me, but I don't have any electronics or wiring and don't know the history of this trany. I was thinking of getting a 700R4 which I think is easier to convert. If you guys think the 4L60E is better to go with than please let me know what you think.

02-26-2011, 07:20 AM	#2
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: 4L60E Trany The 4l60E is generally considered to be a stronger tranny and will probably live better behind that engine.They make "Stand Alone" wiring harnesses for it but they tend to be pricey.Also,not knowing the condition it might be a good idea to have it checked out before installing.You might talk to a couple of tranny shops,maybe you can make a trade or at least get the info to help you make an informed decision. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

02-28-2011, 04:45 PM	#4
MARKDTN Registered User Join Date: Jan 2011 Location: Chattanooga, TN Posts: 2,144	Re: 4L60E Trany Do you have an LT4 that is fuel injected or converted to carbureted? If it is fuel injected, you can just have the PCM changed to add the transmission controls. Someone like Street and Performance or Howell could help with reflashing and adding some wiring. __________________ '83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project

02-28-2011, 06:05 PM	#5
low'n slow Too Dumb To Know Better Join Date: Nov 2005 Location: Texas Posts: 882	Re: 4L60E Trany I did the same thing. We used Street and Performance to reflash the PCM and used their tailhousing to keep the stock speedo. It works good. I moved the engine back with 6 cyl mounts and used the stock auto linkage. Also changed the gearing to 3.73 from the 3.07 ratio.

03-01-2011, 12:09 AM	#6
dave69 Registered User Join Date: Oct 2009 Location: pitt meadows bc Posts: 88	Re: 4L60E Trany Thanks guys I had LT1 Swap do my ECU so I will call him. I am running EFI not a carb.

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