What would be better? I have 2 Servos laying here...
ds1313 or a Savox 1257

They wear more evenly front to rear.

Personally I would go with the DS1313 any day of the week. Savox are strong servos but I am not a fan of worrying whether or not my electronics combo will cause brown outs using that power hungry unit.

I’m running airtronics receivers and an Orion r10pro

I run airtronics as well but I still wouldn't put the Savox in my car

I have 10k/20k/10k in my diffs running on barcodes front and barcodes v2 rear.have plenty meat on rear but front is weared down

probably because you are diffing out

Center Diff fluid is too thin, you're transferring power to the front wheels which dont have traction and they're spinning and wearing out

I've had several different Savox servos in my various vehicles over the years. Never an issue. I run Airtronics/Sanwa.

how much higher should I go maybe 50k?

I would say 50k minimum if your track is really low on traction. 100k to 500k seems to be what most use on medium to high grip surfaces. I use 100k on a medium grip mixed clay track and will probably go to 200k next race.

I'm not saying they're bad servos, as I know of pros that are sponsored and happy with them. But it's kinda like Spektrum for me, they disappointed me too many times in the past to take a dive with them again lol. Plus the servo he had as an alternate had better torque specs than the 1257. That 1257 would only be good in a 2wd in my opinion.

What does everyone use to work on their diffs, whether rebuilding or just changing oils? Are the Diff Service Trays the best thing to use, or what else works good?

thanks for the advice guys,I'll try 100k

Just started building my b64d and I have a front wheel pin problem. Bag 6.1 and 6.2 and it was another bag with some pins but in it..6.3 bag. The ponds don't fit. Any have this problem?