I’m planning on doing a mild upgrade of the 200-4R. I now have it completely disassembled. How much wear on the pump is tolerable? As you can see there’s a slight groove around 70% of the stator shaft where the pump meets the pump rotor. Does the pump need to be replaced?
Does it catch a finger nail when drag one across the mark? I'd dress it up with a whet stone stone send it. Put in hard rings, a sonnax slide spring with the stock spring in it, .500 boost valve, .283 rev/boost valve and 700r4 spring to get the pressure up.
It does catch my fingernail in one area but it doesn't seem that bad. I put in the transgo hardened rings and spring that came in the box. Instead of the transgo spring, you're saying to put a smaller spring inside a bigger one to make it even stiffer? I have the transtar 54008B deluxe kit but I think I should order a washer kit and bearing kit as well, and maybe the wide alto band and billet servo. I think I've seen pictures of that spring setup but I don't know where exactly to get it. Would you recommend the boost valves and springs for even non-race applications? Does it cause the tranny to run a little hotter? STP-K200-4R-V https://globaltransmissionparts.com...MIgZzKnNL95wIVkYbACh21fQbdEAQYASABEgKohfD_BwE https://www.monstertransmission.com...V0MDACh3YyAkJEAQYBCABEgKxivD_BwE#.Xl33PhNKjq0 OR maybe these two would work? https://www.amazon.com/Sonnax-Reverse-Boost-Valve-Sleeve/dp/B00BB10EUS https://www.amazon.com/Sonnax-700R4...SAPS0AS8GB2&psc=1&refRID=TTSE9Q7SDSAPS0AS8GB2
I will get some links together of the things I used and what I did. Maybe tonight after work. I used a carbon band and a sonnax servo. The sonnax stuff is more money but it works and it isn't like you are building a hundred of em. Worth it to me . I had a good time with mine and it was still shifting well several yrs later until August last yrs when the car got rear ended. It will go again when I get it back together I'm sure.
Thanks. That would be helpful. Do these friction clutches look like Raybestos? They say Alto and BorgWarner. I read somewhere the Transtar 54008B deluxe kit is supposed to have Raybestos but they don’t look like Raybestos or high performance.
alto red are good frictions. get the wide band. Also I would install a stator support with hardened splines. In addition to the above recommends.
Did you modify the governor to make it more like the Grand Nationals? http://www.gnttype.org/techarea/transmission/governor.jpg What shift kit would you recommend? Do some shift kits come with the .500 boost valve, .283 rev/boost valve? This link shows an image of the GN valve body? http://www.gnttype.org/techarea/transmission/valvebody.html
I modified a heavy weight governor to make it a Performance weighted governor. In the sticky th350/2094r swap summary thread, i posted a drawing with dimensions of the material I removed.
Just remember, internal pressure,gov weight and spring(s) and VB all combine to create the shift points and the springs all have different heat cycles and tensions now 30yrs later. So you will probably get to do a trans fluid bath or two pulling the gov in and out to get it where you want it.
I haven't posted in a while. Waiting for some parts. I've compiled a list but will continue to edit as I get more info. I'll appreciate any feedback. TH200-4R GM Transmission Rebuild Assembly Purchase Salvage yard 200-4R (lkq pick-a-part, $200)…ideally buy two after 1985 54008B deluxe kit (comes with 12 bushings, carid, $137) Bearings (54201B, Transmaxx $8) Washer kit (C7339B, TruTrans $7) Pump washer (65420D, TruTrans $7) Selective washers (54268K/L/M, cobra, $3) Solid Teflon rings (qty 5, 54177BST, cobra, $10) Billet servo (betperformance, ebay, $75) Hardened pump stator (ebay, $20) Hardened rings and stiffer spring (T74165HP, Transgo, ebay, $15) .500 sonnax Throttle Valve (7791704K, TruTrans $7) .283 reverse boost (A74507RBK, TruTrans, $7) Lock up solenoid (ebay, $20) Oil pan drain (Dorman 65128, $6) 700-4R filter (74011F, Cobra, $10) Assemblee Goo (Ebay, $7) Front seal retainer (w/ seals EASU4L60 $12 or Cobra $1.50) Spring A74741N-3, Anti-Stick Throttle Valve Spring, cobra ?? Thicker direct steel 511769, 0.100” (Transmaxx, $6) 651, extra wave spring, 86282222, (monster, $6) Shift Kit, or diy Total parts $360 Trans Cooler May need to find or make oil pan spacer with sheet metal to be able to use 700-R4 filter 200-4R Modifications According to ATSG part numbers Pump Modifications: ATSG pg. 20, 93 4, hardened pump stator shaft 9, drill and chamfer pump washer? 203, 217 Drill pump drain back holes 0.25”, CK pg. 33 Add red loctite on pump seal and use seal retainer 212, hardened pump rings 209, stiffer spring or dual spring 214, ten vane rotor (not needed) 223, 222, 221, 220, .500 throttle valve and .283 or .296 reverse boost, 219, stiffer pressure regulator spring, (Sonnax 77917-08, 1.93x0.52”x0.040”) 225, make sure clip reinstalls with rounded edge towards valve 232, install washer between pin and spring, protects spring 236, drill cup plug to 0.045", pg 29 Internal Modifications: ATSG pgs. 89-91 19/16 replace with billet, 25/24 discard o-ring, keep the spring, CK pg. 75 507-508, drill 4 holes through steels 0.0625”…compare to 8 holes at 0.125", CK pg. 49 534, machine down to 1.630" (remove 0.080"), adds extra friction plate between two steels, pg. 49 539, Dual feeding direct clutch, remove middle seal of center support (537), plug oil feed hole (538) w/ spare check ball from salvaged governor, CK pg. 72 601, wide band Alto Red Eagle, (P43961, optional, high performance, requires machining drum) 618, billet forward clutch shaft (billet $460, hardened $200, high performance) 604, drill 0.060" bleed hole at 45 degree angle, CK pg. 60 640, Hardened sun gear shell was OEM after 1985 633, enlarge existing holes to 0.150" and add holes, CK pg. 81 636, lube hole 0.125", CK pg. 80 646, drill 0.060"bleed hole in corner, CK pg. 85 651, add extra wave spring, CK pg. 85 Crosshatch steel plates with emory cloth on side that touch friction plates. Crosshatch direct drum. Use a straight edge to make sure it isn’t warped. Governor, tap the secondary weight for an aluminum 8-32 screw to hold spring Valve body plate (#56): ATSG pg. 22, CK pg. 111 #5, drill to 0.11”, if it binds drill additional 0.005” (high performance only), CK pg. 72 #8, drill to 3/32” (0.09375)….compare to transgo 0.072, CK 0.140” #14, 3rd clutch drill to 5/64” (0.078)….compare to CK 0.140” #18, Orifice drill to 3/32” (0.09375) ….compare to transgo 0.072, CK 0.125” #28, Orifice drill to 3/32” (0.09375) ….compare to transgo 0.076, CK 0.110” #27, if non-ECM valve train, Ck says to enlarge to 0.180 if upgrading to GN plate, pg. 112 #33, leave check ball (55N) out and drill small hole of 33 to 0.046” to prevent TV valve from sticking, see pg. 71 of atsg, dvd and transgo Springs: ATSG pg. 75, 92. CK pgs. 102-112 304, use Sonnax 77968-01K tv plunger spring, (L 2.2”, W 0.490, wire .057), longer spring = later upshifts 316, 3-2 control valve spring, CK discards and replace with ¼” plug 319, line bias valve spring (use 700-R4 3-4 drum clutch spring, also Sonnax 77763-01) (TCI replaces with blocker rod, using a 1/8” roll pin ground down to .860 long) 321, accumulator valve spring (use 319 spring) 346, throttle valve boost spring, may not have one, make sure it does, CK pg. 11, 109 59, 1-2 Accumulator, use white 700-R4 spring, 1.766x1.685x0.170, washer spacers or ¼” nut over #76 pin for more, CK pg. 113 51, 3-4 accumulator use red spring, CK pg. 115 Always install the accumulator piston in the case before the spring, CK pg. 115 …………………………………………….. *61,59, may be omitted if ¼ checkball is tapped into feed hole (high performance), CK pg. 114 348, some vb’s have valve train, this vb not recommended, pg. 106 350, verify plug, clean orifice and keep 351, verify cup plug, pg. 107, remove to improve forced 2-1 shift kickdowns True the gasket mounting surface and vb plate with wet stone, clean and dry. Check balls: ATSG pg. 23, 71 OEM comes with 9 check balls below vb gasket 55D (2), 3rd accumulator 55E (6), Reverse/3rd 55F (4), 3rd clutch 55G (9), Lo/Detent 55H (10), Lo/Reverse 55J (1), 4th Accumulator 55K (7), Intermediate servo check ball in capsule…. CK pg. 125, 126, 141 55M (3), PT/D3 55N (5), TV exhaust, largest check ball….discard, CK pg. 141 55A, 55B, 55C, 3 checkballs on VB gasket, atsg pg. 77 Jakeshoe: You will use 5 checkballs in the case. Rule of thumb on a 200-4R. If it's a bathtub it gets a checkball always. There are 4 in a line from front to rear. 2 small checkball locations and 2 bathtubs, install in the bathtubs, leave out of the small locations (3rd accum and 3-2 ) Air tests: applying 60 p.s.i. of compressed air Direct clutch Forward clutch Center support Overrun clutch assembly, air in the turbine shaft, CK pg. 47 4th clutch after assembly, CK pg. 137 Servo/band Clearances: measure with feeler gauge or dial indicator Gears: 524, 525, Overdrive carrier pinion assembly, .009-0.024”, CK pg. 41 636, Front carrier assembly planet gear, 0.003-0.024”, CK pg. 80 661, Rear carrier assembly planet gear, 0.003-0.024”, CK pg. 90 Clutches: 615, Direct clutch, with feeler gauge 0.030-65”, CK pg. 62 (Apply-ring from older front clutch is taller and can be used in direct clutch if needed. Steels are 0.091”, May need to order thicker steel 0.100”) 628, Forward clutch, with feeler gauge 0.020-30”, CK pg. 70 631, Rear section end play, feeler gauge under snap ring, 0.002-.006” (compare to OEM 0.004-.025”) 629, Center section end play with dial indicator, after 530 is installed, 0.006-0.008”, CK pg. 134 (center end play must be greater than rear section, compare to OEM 0.020-.050”) 9, Front section end play, lift 503 input shaft 503 play minus 524 clearance = front section end play, 0.003-0.006”, CK pg. 139 Dvd clamps vice grips on top of stator shaft, turns trans upside down then uses feeler gauge (compare to OEM 0.004-.030”) 524, feeler gauge under snap ring, CK pg. 47 601, Band clearance, servo, CK pg. 136 506, 4th gear clutch, not critical but must have some, CK pg. 137 Seals, Washers, Bearings, Bushings: ATSG pg. 94 O-rings and Seals 17, servo cover o-ring 18, servo inner seal 20, outer piston seal (servo) 22, inner piston seal 28, seals for servo apply pin (two) 33, rear housing oil seal 37, governor oil seal ring 40, electrical connector o-ring 46, case to housing reverse oil seal 50, 3-4 accumulator piston seal 52, solenoid o-ring 60, 1-2 accumulator piston seal 66, pan gasket 67, filter seal 201, front pump seal 204, pump slide ring 205, pump slide o-ring 210, pump slide seal support (orange color) 211, pump slide seal, black 502, turbine shaft o-ring 504, Turbine shaft solid ring 504, Turbine shaft scarf rings (two) 512, overrun clutch seals 535, 4th clutch seals (2, center support) 539, oil seals (3, center support shaft) 606, direct clutch piston seals 616, forward clutch shaft Teflon rings 621, forward clutch piston seals 648, lo/reverse piston seals 10, Pump to case ring seal ring Dipstick o-ring Thrust Washers 9, pump housing selective, affects front end play (yellow 0.188”) 531, internal gear support 541, support/direct clutch 617, direct/forward clutch 629, forward drum to output shaft selective, affects center end play (#13 0.128”) 631, rear selective, affects rear end play (#3 yellow 0.131”) 632, internal gear/rear 643, input drum/housing 662, rear carrier/internal gear Bearings 523, carrier/sun 528, carrier/internal gear 635, roller, internal gear/carrier 637, front carrier/sun 659, rear cam/lo race 663, sun/internal roller thrust Bushings 4, Stator shaft 202, pump body 509, overrun clutch, CK pg. 44 522, overdrive carrier 656, forward clutch housing 602, direct clutch, front 536, center support 540, center support 605, direct clutch, rear 634, front internal gear 641, rear sun gear 645, Lo/Reverse housing 660, rear carrier 32, rear case Tools: Snap ring pliers Small flat head screw driver 1-3/16 socket to remove tail housing bushing Race driver set, old bushings and big washers of varying sizes Table top press, Clutch spring compressor or c-clamps Cobalt drill bits from 3/64, 1/16, 5/64, 3/32, 7/64, 1/8”
Does anyone have links to properly setting up lockup with the cruise control switch (not a vacuum switch) and setting up the throttle valve detent cable?
