tranny issues, please help soon

[DJTricky]

ok so i am having some problems, my tranny wont shift into 3rd or 4th but i have 1st and 2nd, it wont shift into 2nd from 1st unless im above 30 mph, at first everyone was telling me it was my TPS, so i replaced it, now its still doing it. what do i have to do to fix this, please help soon

 

["350Vortec"]

Bad buffer, Broken wires from sensor, or broken speed sensor itself. Maybe Sticky Solenoid, Worn out bands?

 

[DJTricky]

my speedo works, and i tested all wires.

 

[BOSS]

Pull the codes...with the info you provided it sounds like the typical 3/4 clutchpack going out problem. Need more info and check my threads, there's a good one on common 4l60e tranny problems

B

 

[DJTricky]

well i have a couple more questions, the car club im in gets me a discount on some stuff from this place, so what do you think i should do?

basic rebuild kit -$64.95
http://racetransmissions.com/store/product_info.php/cPath/203_204_211_237/products_id/1011

performance rebuild kit - $265.00
http://racetransmissions.com/store/product_info.php/cPath/203_204_211_237/products_id/1014

or just buy a new performance tranny - $1,395.00
http://racetransmissions.com/store/product_info.php/cPath/1_25_59_122/products_id/66

 

[bai78]

IIRC the "beast" sunshell, heavy duty sprags, & 5 pinion planetary are key components for a "performance" 4l60e. I am surprised they are not offered in the performance rebuild kit.

Personally, you should go with a reputable local tranny builder. This way if you have issues he is readily available to look at it & not have to diagnose problems via phone, email, etc... It will also save you dropping out the tranny to ship it back if it is found to be defective.