rebuilding a 700r4 for my 78' pontiac *** i was going to use go with B&M full synthetic all the way.looking online all i run into is amsoil synthetic. everything will be new on the inside of this tranny. so want to do the right thing here. am i throwing away money with syth. or is conv. the way to go. i on't race her at the track and i'm looking for performance and reliability.  

I have never used synthetic trans fluid in any of my transmissions only conventional and never had any problems on the street or racing and I recomend valvoline ATF.But www.summitracing.com carries b&m full synthetic trans. fluid.  

Use it! Amsoil is second to none. If your not using a rebuilt or new converter drain the old one overnight in a 5 gallon pail and blow out the cooler lines to remove any residual fluid.  

Use it! Amsoil is second to none. If your not using a rebuilt or new converter drain the old one overnight in a 5 gallon pail and blow out the cooler lines to remove any residual fluid.  

Use it! Amsoil is second to none. If your not using a rebuilt or new converter drain the old one overnight in a 5 gallon pail and blow out the cooler lines to remove any residual fluid.  

sorry about the multiple post my comp. seems to have a mind of it's own  

With synthetic oils ability to better withstand heat I use it everywhere in the Vega -Mobil-1 in the engine,B&M in the trans.,Valvoline in the rear end,and I can't remember the maker of the brake fluid.
With the stronger film strength,better heat resistance I just think it is good insurance,but I don't use it for my daily drivers due to cost.  

thanks! i was kind of considering the same things that you mentioned, but i wasn't sure so i thought i'd get a few opinions on the subject. so Thanks. bandit burning out or at least soon wil be.  

I have found that in Daily Drivers it can improve mileage from 2-3 mpg in the engine and the same in the trany . That with the cut down in wear, unless I have a leaker, I put Synthetic in everything.  

synthetics are better in almost every way, i use amsoil everywhere in my truck and have gad great gains in mpg, power and vibration  

I vote synthetics.  

I use Valvoline Durablend 10/40 in my rebuilt motor. It has 85,000 hard run miles and it is still clean under valve covers and in lifter valley under intake,and i get 18.6 miles per gallon on interstate with 305 sbc with 3 speed 350 turbo and 2.29 rear ratio. I am using qjet carb. Synthetic blend is my choice for good,as full synthetic blends are much more expensive.