Gents,
I would like to hear what fluid are you using in your Getrag 280 5 speed trans and share experiences about quality shifting and lonegvity of the synchros etc.
I know these trans. use "ATF" as per recomendation from BMW/Getrag. I did once change the fluid to Castrol Syntrans (can't remember what GL and viscocity it was) and it ran normal I could say, normal shifting etc etc...this until I purchased few gallons of Redline products for the e30 M3, the e34 M5 and the Porsche, to change all the trans and diffs oil with Redline products.
According to Redline web, for the e34 M5 is recomended the D4 ATF for the manual trans (at least last time I checked a year ago, but now seems like they switched to MTL if you search now by model)
But since I did purchase as well other fluids included the MTL 75W-80 GL-4 for my e30 M3 Getrag 265-5 as recomended by the web I used this MTL by accident in my Getrag 280 and used it for a while until my tech ahd an accident with my MAF that kept my M5 away from duty for long time. Now that I'm finally doing some service and fixes to my e30 M3, including to overhaul the Getrag 265-5 I noticed that the MTL was used for my m5 and the D4 ATF gallon was sealed! Big mistake...well, I took off the MTL (saved it after filtering) from the Getrag 280 and filled up with the "correct" D4 ATF and I have been using with it daily.
After some "test" I feel like the MTL was way better fluid for my Getrag 280 in terms of quality shifting, it was way smoother , felt more precise, less effort the shifts vs the recommeded D4 ATF that I'm using now. I did write to Redline tech and told him what I did, he said the MTL won't have any negative effect in the Getrag 280 and it could be smoother operation due their slippery content in the fluid and other components but I would have to switch to D4 ATF.
I don't know if the MTL could damage our synchros in the long term or not, but I loved when the MTL was in my Getrag 280 and now I kinda hate the D4 ATF.
By the way I did use their 75W90 GL-5 Gear Oil for my rear diff and it took care of the annoying noise like "moaan" when the diff was hot doing maneuvers in the parking lot or taking corners at slow speed. Now it operates smooth and no more noises.
-Diego
I would like to hear what fluid are you using in your Getrag 280 5 speed trans and share experiences about quality shifting and lonegvity of the synchros etc.
I know these trans. use "ATF" as per recomendation from BMW/Getrag. I did once change the fluid to Castrol Syntrans (can't remember what GL and viscocity it was) and it ran normal I could say, normal shifting etc etc...this until I purchased few gallons of Redline products for the e30 M3, the e34 M5 and the Porsche, to change all the trans and diffs oil with Redline products.
According to Redline web, for the e34 M5 is recomended the D4 ATF for the manual trans (at least last time I checked a year ago, but now seems like they switched to MTL if you search now by model)
But since I did purchase as well other fluids included the MTL 75W-80 GL-4 for my e30 M3 Getrag 265-5 as recomended by the web I used this MTL by accident in my Getrag 280 and used it for a while until my tech ahd an accident with my MAF that kept my M5 away from duty for long time. Now that I'm finally doing some service and fixes to my e30 M3, including to overhaul the Getrag 265-5 I noticed that the MTL was used for my m5 and the D4 ATF gallon was sealed! Big mistake...well, I took off the MTL (saved it after filtering) from the Getrag 280 and filled up with the "correct" D4 ATF and I have been using with it daily.
After some "test" I feel like the MTL was way better fluid for my Getrag 280 in terms of quality shifting, it was way smoother , felt more precise, less effort the shifts vs the recommeded D4 ATF that I'm using now. I did write to Redline tech and told him what I did, he said the MTL won't have any negative effect in the Getrag 280 and it could be smoother operation due their slippery content in the fluid and other components but I would have to switch to D4 ATF.
I don't know if the MTL could damage our synchros in the long term or not, but I loved when the MTL was in my Getrag 280 and now I kinda hate the D4 ATF.
By the way I did use their 75W90 GL-5 Gear Oil for my rear diff and it took care of the annoying noise like "moaan" when the diff was hot doing maneuvers in the parking lot or taking corners at slow speed. Now it operates smooth and no more noises.
-Diego