well my 3rd gear synchro is messed, when i downshift from 4 to 3rd, 70% of the time it makes a grinding noise.

would switching to the amsoil or redline solve this?

currently running RP

 

http://www.racerpartswholesale.com/redline4.htm
ordered my redline fluid from here....its 8.49 a quart

 

i've been using Penzoil Synchromesh. I haven't had any problems, and know a couple other people running it in their Betas.

 

Yeah I use the Penzoil Synchromesh in my transmission as well. And it is the exact same as the GM Synchromesh that I used to run in my transmission.

 

I don't know if it willl work on yours; it worked on mine. It's the best dang tranny oil I've ever used. i will never look back.

 

Choose carefully. Amsoil SG gear oil is NOT safe for the yellow metals in our synchronized trannies, for instance. Other Amsoil products may work (Series 2000?), but no one carried them in my area, and I really dislike the infomercial-like Amsoil marketing, so I didn't want to run it anyway. Most GL-5 gear oils have sulphur and/or phosphorous additives which we can't use. Mobil1 LS is GL-5 rated and CANNOT be used either. I got that straight from the Mobil1 1-800 customer support number, since I see so much conflicting information about whether it can be used. Call them yourself.

Unless it's multi-rated, don't chance it. By the time you notice a problem, it will be too late. If it is multi-rated, it will say so on the bottle.

Penzoil Syncromesh is a good one and widely available. I love Royal Purple; when I switched to it I noticed a huge improvement in shifting smoothness. One reason I moved away from Redline is that no one carries it in my area, so I would have to order online if I needed to top it off or change it. That's reason enough for me when other good alternatives are locally available. I don't think switching from RP will provide an improvement based on my experiences with different gear oils, but flushing out your tranny and putting in fresh oil might help. I drained mine after just one year, and it was pretty contaminated.

 

Can anyone post a DIY on changing the gear oil? My shifts are real hard and I think it might be time for a change. I just have no clue how to do it, but I am decently mechanically inclined, so im confident I can do it myself if someone gives me a DIY. Thanks..

 

After you change the Tranny Fluid, get yourself some APE Shifter Bushings from FlyRyde. They help make your shifts rock solid!

http://flyryde.com/carparts/Products....asp?catid=383

I got em in my car. I think several other people on here have them too and have enjoyed simliar solid shifting results.

 

Honestly, there's no need. It's as easy as changing your motor oil. You only have to remove two bolts: One on the bottom of the tranny to drain (have an oil pan ready), and one on the side of the tranny to fill. The latter is on the front of the tranny, right at 90 degrees. They're big bolts, you can't miss them.

Pick up a funnel that has a shut-off and several feet of plastic hose attached before you do it. Makes it easier. Park on a level surface, and just keep filling until oil starts to come out of the fill hole. Then you're done.

There are pictures on webtech. If you have high mileage and are still on the original fluid, consider running the fresh fluid for a short time only as a flush (say a week) if the old oil came out really dirty. My original fluid at 67k miles was loaded with metal dust. I think that's a safer way to do it than having it backflushed at a shop, and it's ceretainly cheaper.

 

I have an email from Penzoil saying to NOT use there syncromesh in a hyundai transmission.