[colinwilson]

2006 LJ 6spd standard trans (hydraulic): This winter I noticed when I attempt to shift from 1st gear to 2nd gear, the gear grinds and takes a second for me to engage the gear. It will not do this when the Jeep is fully heated up to running temp. Is this something to worry about (bad synchros) or is it the gear is just not properly lubricated in colder temps?

I had this problem and flushed my tranny and it got a lot better. Still does it cold, but always works when warmed up.

 

[Danbizzle2009]

If it helps, I only 41k on the odometer.

 

[Danbizzle2009]

Bump

 

[Sinister6]

2006 LJ 6spd standard trans (hydraulic): This winter I noticed when I attempt to shift from 1st gear to 2nd gear, the gear grinds and takes a second for me to engage the gear. It will not do this when the Jeep is fully heated up to running temp. Is this something to worry about (bad synchros) or is it the gear is just not properly lubricated in colder temps?

I had issues also, I had changed my fluid with Penzoil syncromesh...had a lot of heat and rough shifts. Flushed that crap and switched to Redline MTL....HUGE improvement! I'd start with the simple then spend money on a professional diagnosis.

 

[Danbizzle2009]

Sinister6, happen to have a link of pic of which kind of MTL to get, and where to get it? I have an Oreilly's nearby.

 

[Shark_13]

Sinister6, happen to have a link of pic of which kind of MTL to get, and where to get it? I have an Oreilly's nearby.

You probably won't find it locally, I couldn't anyway.
http://www.summitracing.com/parts/red-50204?seid=srese1&gclid=CLqJzKLwzMsCFQQbaQodOZQCKg

 

[Danbizzle2009]

Thank you both, I'll order up two (right?) and I'll look for a 17mm Allen head.

 

[Sinister6]

Thank you both, I'll order up two (right?) and I'll look for a 17mm Allen head.

I use this and bought it here: Red Line 50205 MTL 70W80 GL-4 Gear Oil - 1 Gallon https://www.amazon.com/dp/B002INJ69I/ref=cm_sw_r_sms_awd_v5x7wbKYS2KGP

 

[Danbizzle2009]

Just ordered up two qts of Redline MTL. I'll post up update if it helps/cures the problem.

 

[AggressiveTuna]

I had the same issue, changing tranny oil helped, but not immediately. Now problem seems to be gone.

When you take the bottom plug out examine the magnet, there will probably be a bunch of crap on it. small shavings are expected, gold shavings or specks are indicative of the synchro deteriorating. post a pic of what it looks like.

Also if the problem persists, try double clutching into second, can help ease onto a bad synchro. Double clutch by clutch pedal in -> put in neutral -> clutch pedal out -> pedal in -> 2nd gear, then make sure to match revs since it will probably take a bit longer than a standard gear change.

 

[Danbizzle2009]

I changed the fluid with MTL. Still a little grind into second but a little better. Here's a picture of the drain plug. No yellow shavings suggesting worn syncros but I feel as if they are still the problem. Or maybe it takes a while for the fluid to "heal?"