I have a friend who has a 98 GLE, and he is thinking of putting in a new Manual transmission. What kind of suggestions would you give him. Do you think he would have problems after he does it ? Thanks

 

dont do it; let daniel b maxima to be the next to tell you, trust me- i asked too

 

Possible? Yes. Practical? No.

Price it out. You will faint when you find out how expensive this is.
Don't imagine this is just a trans-for-trans swap. You will need a
flywheel, clutch, throwout bearing, clutch pedal, clutch
hydraulics, shifter, etc. etc.

If you are absolutely in love with the idea of converting to 5-speed, look
for a wrecked car (an organ donor) that you can buy for low money. That
way you get everything you need in one package.

The best course of action is to find a clean 5-speed, buy it, and sell your present car.
Who knows, you might even find a guy who is willing to trade because he just got married,
his wife can't drive a stick, etc. etc.