Powerglide Installation and Technical Info

Transmission Fluid Requirements
How often should you change your tranny fluid?
Powerglide Transmission Fluid Capacity
Flexplate to Converter Clearance
Shifter Cable Backlash - the Silent Transmission Killer

Transmission Fluid for High HP Race Cars

Neal Racing Transmissions highly recommends the use of AMSOIL Compressor Oil for use in all of our transmissions, especially those in extreme horsepower applications. There are two specific reasons why we want our customers to use this fluid;

• Very High Flash Point - AMSOIL Compressor Oil has a much higher flashpoint than regular transmission fluid - It's rated at 495° and a firepoint of 522°. Many other brands of conventional transmission fluids have flashpoints between 320° for Type F to 375° for Dexron. That's a big increase and could save you from a fire someday.
  
  
• No Friction Modifiers - AMSOIL Compressor Oil has no friction modifiers. These transmissions are going into race cars, slipping clutches is not something we want to happen so we don't need friction modifiers to make our shifts "smoother". Note: Regular AMSOIL transmission fluid does have friction modifiers in it.

We've used this specific oil in many of the fastest powerglide race cars in the world with great success. The AMSOIL Synthetic Compressor oil is both safer and helps our transmissions live longer, more productive lives so they can go out and set records and annihilate the competition.

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To purchase contact AMSOIL Dealer Mark Pusen at 770-466-7127 or purchase online at www.superiorperformance.net

Important Note: Mark is the largest stocking AMSOIL dealer in the State of Georgia, we highly recommend dealing with him instead of other dealers because this guy goes to the races and knows what's working in High Horsepower applications including other parts of the race car. You should consider him a racing lubrication specialist with the testing he's done whereas other dealers likely will not understand the use of the compressor fluid or other lubricants in high stress situations.

SYNTHETIC COMPRESSOR OIL (ISO 46, SAE 20)
Stock #	Pkg/Size
PCI-01	12 Quarts
PCI-05	5 Gallon Jug

How often should you change your tranny fluid?

This varies a lot depending on what kind of car you have and the conditions you put your car through. In the extreme conditions such as a Outlaw Turbo Car that gets hung out on the starting line where you're at boost for say 5-10 seconds and up against the converter, you ought to change it after the pass because you just got the oil REAL hot and there is no doubt that you hurt it.

• For turbo cars we advise changing the fluid after every race.
  
  
• Nitrous cars should change their fluid every 4 races.
  
  
• 6.0 - 7.0 or N/A cars can get a whole season out of the recommended AMSOIL Compressor Oil.
  
  
• If you're using for some reason regular tranny fluid, you need to change it much more often.

Fluid Capacity

A dry Pro Series Glide with 10" Neal Chance Converter requires 9 quarts of fluid to fill up. Make sure and put at least one quart of fluid in the converter before installation. The 10" converter should hold right at 2 quarts if you take your time to let it fill up. Also make sure to lubricate the converter and transmission seal before installation.

A dry Pro Series Glide with 9" Neal Chance Converter will require between 8 1/4 to 8 1/2 quarts. Again put at least one quart of fluid in the converter before installation.

The fabricated aluminum pans we use require the use of anti-seize lube on the drain plug threads.

Our glides with the fabricated aluminum pans require 4 1/2 to 5 quarts for between race or between rounds fluid changes.

Beware of improperly marked dipstick tubes, especially the LoKar and Moroso brand dipsticks. These dipsticks are almost always wrong and may need modification to read accurately. The Pro Glide should be almost flush to 1/2" low with oil at the dipstick tube opening on the case when it's full. With the car running the fluid level will drop to approximately 1 1/4" lower then the dipstick hole.

Flexplate to Converter Clearance

You should be able to pull your converter out of the transmission a maximum of .120" to a minimum of .100". Shim the converter lugs to this distance as required. Neal Racing Transmissions stocks aluminum shims that screw to the feet of the six lug aluminum drive covers, just call and tell us what thickness you need. Do not run the car if you don't have your converter clearance correct. If you must use washers, avoid the stamped steel washers which often vary in thickness, use machine washers or head bolt washers that have been measured with a caliper or micrometer to be the same thickness.

Shifter Cable Backlash - the Silent Transmission Killer

Some brands of low cost shifters have excessive cable backlash in them due to their poor "one size fits all" construction and cheap Chinese made cables. "Cable Backlash" or in other words, a sloppy cable and gate system can and has led to transmission failure that we've seen happen far too often. A good example is Danny Sample's Outlaw 10.5 Trans Am, this car burnt the transmission up on the chassis dyno due to a cheap shifter that was installed correctly, but had too much backlash.

What happens is the cable adjustment is set with the car in say low gear and when you move the shifter into high it lacks enough travel to move the shifter arm all the way into gear. Move it past high gear to neutral then back and it will drop into place but it's something people usually do not notice UNLESS you are looking for it. In Danny's car we got to looking and found his shifter had over .200" backlash in it which is more than enough to cause improper shifting, especially when combined with poor gate/shifter arm design. The damage a sloppy shifter can cause ($800 - $1200) to a race transmission makes the high quality shifters like the Precision Performance Shifters very price effective in comparison.

Not all cheap shifters have a problem like this, fact is we don't know which brand/models do or do not, what we're saying is check your shifter and make absolutely positive that the gates in the shifter line up perfectly with the all the detents in the transmission - look for the slop in the mechanism and cable that we're describing. If your shifter has it, get it fixed before burning the transmission up. If you don't have a shifter, call us, we'll fix you up with the best setup available.