cnterline

have an 03 sl 500 with the 5 speed trans,have kleeman s/c headers x pipe eisenmann ex,had kleeman tcu upgrade to sl55 specs but 1-2 shift sucks bad,like half a sec on 0-60 kills et,any other options,i know of a company that sells solenoids for 1-2 shift but he says he doesnt know if it will solve problem,could be computer pulling timing and or closing throttle a little,I had heard these trans have a torque protection limiter on them for 1-2 shift ? can anyone help or advise a fix ?

IngenereAMG

It sounds like your car is producing allot of tq and the TCU is making everything take a break to preserve the gearbox. Does it do it in auto and manual modes? Are these mods new? If so, there may be an adaptation process going on. How much hp/tq does the car make?

Sunir

Dino...is there an adaptive process on SL55 (engine/tranny ecu or otherwise...)? I don't know if the SL500 adapts depending on driver, I know some cars do that...is the SL55 the same way?

rsr911

Yes AMG engine/transmission and ECU all work in concert and does have adaptive learning.

cnterline

I re set everything,had benz do it with the star,need another option,I heard there is a solonoid kit for the 1-2 shift from southern hot rods, wanted to know if anyone has used this kit