350 trans
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Teching In
Joined: Feb 2015
Posts: 4
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Both of 4l60e want change it of first gear and slipping bad, I don't kno if computer causing me to run threw them like that or I just the transmissions both of them have shaved metal in fluid, I kno a ls1 shouldn't be the cause of this
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Joined: Aug 2010
Posts: 7,322
Likes: 528
From: Ann Arbor, MI
If you give us a detailed and clearly written explanation of the problem with the 2nd transmission we might be able to help.
Also where did the 2nd 4L60E come from? Was your original trans rebuilt or did you get the 2nd from a junk yard?
Besides losing overdrive, keep in mind that switching to a TH350 will require a speedometer adapter, a spacer kit, a longer drive shaft, adapting the torque tube and other details which will boost the price.
Sponsor Performabuilt sells their Level-1 4L60E for around $1000.
Performabuilt and FLT (and RPM?) sell their Level-2 for around $1500 and lots of people race them for years with 500HP.
Tell us what city you are in and we might have other suggestions.
In short, I suspect your original 4L60E simply wore out from many miles and your 2nd one was a too-cheap rebuild or worn-out used one.
Also where did the 2nd 4L60E come from? Was your original trans rebuilt or did you get the 2nd from a junk yard?
Besides losing overdrive, keep in mind that switching to a TH350 will require a speedometer adapter, a spacer kit, a longer drive shaft, adapting the torque tube and other details which will boost the price.
Sponsor Performabuilt sells their Level-1 4L60E for around $1000.
Performabuilt and FLT (and RPM?) sell their Level-2 for around $1500 and lots of people race them for years with 500HP.
Tell us what city you are in and we might have other suggestions.
In short, I suspect your original 4L60E simply wore out from many miles and your 2nd one was a too-cheap rebuild or worn-out used one.
Last edited by mrvedit; Mar 4, 2015 at 03:20 PM. Reason: Edit - Change Level-3 to Level-2
If you give us a detailed and clearly written explanation of the problem with the 2nd transmission we might be able to help.
Also where did the 2nd 4L60E come from? Was your original trans rebuilt or did you get the 2nd from a junk yard?
Besides losing overdrive, keep in mind that switching to a TH350 will require a speedometer adapter, a spacer kit, a longer drive shaft, adapting the torque tube and other details which will boost the price.
Sponsor Performabuilt sells their Level-1 4L60E for around $1000.
Performabuilt and FLT (and RPM?) sell their Level-3 for around $1500 and lots of people race them for years with 500HP.
Tell us what city you are in and we might have other suggestions.
In short, I suspect your original 4L60E simply wore out from many miles and your 2nd one was a too-cheap rebuild or worn-out used one.
Also where did the 2nd 4L60E come from? Was your original trans rebuilt or did you get the 2nd from a junk yard?
Besides losing overdrive, keep in mind that switching to a TH350 will require a speedometer adapter, a spacer kit, a longer drive shaft, adapting the torque tube and other details which will boost the price.
Sponsor Performabuilt sells their Level-1 4L60E for around $1000.
Performabuilt and FLT (and RPM?) sell their Level-3 for around $1500 and lots of people race them for years with 500HP.
Tell us what city you are in and we might have other suggestions.
In short, I suspect your original 4L60E simply wore out from many miles and your 2nd one was a too-cheap rebuild or worn-out used one.
