[86ltrain]

Thought I'd post this to see what you guys think...This is the list of mods that my builder provided for the tranny I rec'd(its alot to read, but interesting), I'm no expert but it sounded good to me. They called this there 700R4 HD/towing 4x4. They were rediculously slow on shipping but if its as good as they claim, it was worth the wait.

1-10 VANE PUMP -
you might ask why not a 12 vane well in test i have seen done the 10 rotor actually pumps more volume than the 12 the persistant thought is that the additional vanes simply take up more space in the pump but since the actual size or the area is the same theres less actual volume
2-MODIFIED LUBE CIRCUIT
as with most trannys the design is to use vented fluid from the preasure regulator to supply lube to the planetaries this is not a good idea since presure on coast can sometimes be quite low and the pr valve might not be in release mode ,thus under certain conditions such as coasting down a hill or full throttle run with let off and coast down the planets get no lube and even in a short time get very very hot so we modify the pr valve to allow bleed off to lube circuit at all times .
3-SONAX KEVLAR BAND
this band is 2.5 inches in width the stock is 2.25 this is a large increase in holding area in the intermediate drum in second and again in fourth gear .it also has a heavily reinforced band pin area to prevent pull though comon with agressive shifting performance trannys associated with the stock band .and everyone knows kevalr dosent mind getting hot !
4-RESURFACED 2-4 REVERSE INPUT DRUM
the drum the sonax band above rides on is machined for the 2.5 inch band the reason this must be done and many others dont we have learned, they try either a new drum or a pretty straight old one and in either case it wont work the reason being we have looked at new drums used a str8 edge on them and they are fine for the stock 2.25 inch band however gm never bothered to finish edges of drum properly and they raise but a few thousands at each end .THE problem the band grips the outer edges of drum first and then catches the center causing the band to be burned at the outer edges .so we machine all the drums in the super performance 4l60e transmissions and our MAX 700r4 trannys that use the wide band .
5- FINAL DESIGN 29 ELEMENT INPUT SPRAG
the is simply the strongest sprag that gm has to offer for either the 4l60e or the 700r4 if it dosent hold nothing will ,at present even the after market has nothing stronger .there used to be a product called the diode and it was stronger but was taken off the market due to durabilty problems they wouldnt break but they wore out rather quickly we used some that were wobbly in only 20000 miles
6-CORVETTE SERVO
this is the largest servo gm offers for this transmission and the one we prefer even over the after market billet servo ,the reason for this is its has the largest area while still allow proper release area for the band on the third gear shift ,you see the second gear oil is on one side slightly smaller applying the band while on the third shift the third gear oil comes in on the other side of servo and releases band ,they are at the same preasure ,the aftermarket billet servos have both sides the same size so you can see that if there are two equal forces working from each side over the same area the servo will not release or if it does there will be considerable overlap and although this dosent really affect the band much it plays havoc with the 3ird frictons since they have considerable less apply area /
7-9 FRICTION 3-4 CLUTCH SET
the stock 4l60e and the 700r4 come with either a 5-6or 7 friction third gear ,the 5 friction being most common in the 4l60e we replace this with and alto 9 friction set up accomplished using both thinner steels and frictions this increases the holding ability in third gear by up to 40 percent .also we enlarge the release oil passage in the valve body plate to get then out of the way in a suddden kick down to second for the same reason stated in the band section .
8-FORWARD CLUCTH
we use the thinest apply plate available to allow for the maximum number or frictions possible and we eliminate the waved cushion plate GM so thoughtfully included in favor of still another friction ,GM put this waved plate in to sofen the shift from neutral or park to drive making the engagement quiet pleasant this is not and issue to us we would rather have the holding power the forward clutch even though quite strong even from GM has to hold every bit of power you give in every gear except for fourth ,
9-THE BEAST SUNSHELL
the sunshell in the 4l60e as with the 700r4 was made very thin with only a tiny area of weld to hold the entire impact of both the 2nd gear and fourth gear shifts this done to conserve weight a few ounces .while it was fine for stock applications even then it failed when used for pulling ect regularly .the BEAST shell is specially redesigned its about 2x thicker and has a special bearing arangment to allow to a considerably thicker weld area and is considered to be up to three times stronger than than stock one it was made to take a beating
10-THE FAIRBANKS SUPERIOR OVERDRIVE SERVO
This servo has a considerably larger holding area that the stock over drive servo allowing
one to safely tow in overdrive ,it uses lip seals instead of the teflon ring to cut pressure loss .a major improvement over the stock servo

11-SHIFT KIT
our shift kit is actually a combo of superior and our own mods its built around the idea that performance is the priority and although it may not jerk your eyes out cruising you will definatly know its there and if you get on it and your like me WOW! .This is done with some springs and larger holes and increased line preasure and alot of other technical things to complicated to get into here
12-WE ALSO CROSS HATCH ALL OF OUR STEELS
this is done to improve holding and cooling by allowing some fluid to stay between frictions and steels while also increasing friction capabilities of these for greater holding .
13-ALL THE PlanNETARY GEARS WHERE THEY MEET A NEEDLE BEARING ARE SLOTED THIS BECAUSE WITH THE NEEDLE BEARING BEING A SMOOTH SURFACE AND THE PLANET THE SAME LUBE CAN AGAIN BE BLOCKED WITH THE SLOTS THIS NEVER HAPPENS AND THE LUBE IS ALWAYS THERE lack of lube kills more or these trannys than HP ever has

THESE TRANNYS ARE AVAILABLE IN EITHER 2 OR 4 WHEEL DRIVE JUST SPECIFY WHEN YOU PURCHASE

SO THERE IT IS EVERYTHING YOU NEEDED TO KNOW ,THERES ACTUALLY EVEN MORE BUT MOSTLY THOSE HAVE TO DO WITH DURABILTY ,STOPING SEAL BLOW OUT ECT AND I WONT GO INTO ALL THE DETAILS HERE THIS IS LONG ENOUGH NOW .

FRANK



the transmissions come with a 12 month unlimited milage warranty