Amsoil is the best out there. Serviced my nv4500 and the 250k beast is still shifting gears like new.

First time using this product and it is the best product i have used to date. Please note that if you use a pump to install that the bottle opening is bigger so have the appropriate sized pump for that. I onlyhad the normal size at the time so i have to improvise.

Needed to replace clutch in my 78 FJ40, this was perfect for Transmission and transfer case, shifts more smooth than ever

No difference in shifting but I use amsoil products in everything I own .

Put 7 quarts in my cummins g56 transmission after reading several good reviews of this fluid and i could not been happier only issue is i should have done it sooner. The truck is quieter and no issues with shifting at all. Dodges atf4 is not what mercedes says is the correct fluid for the transmission as this is one of the easily obtained fluid for consumers in north america to get. I will be swapping this into the axles when the time come for their service as well.

I've had good luck in the past with this product, but after putting it in my 296k mile trans it is harder to shift and makes more noise. I will have to switch to a synchromesh or try another product.

Works as described and I feel good about having it in my truck. No other fluid I'd rather run off-road

Put this in a 07 Pontiac vibe (as recommend on amsoil website), it worked great for about 4000 km but then ran into issues with shifting and gears grinding, switched it out to the severe gear oil and never looked back, way better performance now. Now I am sure this product would work great in other manual transmissions.

I used this product in my 95 Geo Tracker, it shifts so smooth I can shift without using the clutch. Also the counter shaft bearings quite whining.

I just finished a clutch job on a shop truck (97 Dodge 2500) that has been through more than one over the last few years due to a number of different drivers. Owner said this time was different and the truck was shifting like the day he drove it off the lot, the only thing I did that I hadn't done before this time was use Amsoil. That simple.

Topped off after a drive axle replacement. Seems to work great. Shifter and pedal are happier!

Currently using it in my 94 ram with the nv4500 and in my 04 VW TDI. It meets the specs for both vehicles manual transmissions, smooth shifting all around. Recommended to my friends and family.

hard too find gl4 in any good quality at all ..answer to my needs for a synthetic diff lube that will not attack the yellow metals in my components ..well done