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#1
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ATF Level
My friend has a T400 he is putting in place of a 2 speed. It was rebuilt by tranny shop and didn't have a dipstick or tube. I gave him one from another T400 I had. How do we know if level is correct? Engine and tranny is out of car now so it might be easier to confirm dipstick.
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#2
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Unless you have a dip stick and tube out of a 70s front wheel drive Olds Tornado then there was only two other lenght set up's I know of.
If what you have there comes up to close to the level of the rear of the passenger side valve cover then you have the normal A, B and F body set up.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
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Are you asking how to do it, or just asking for measurements? I don't know the measurements for a TH400, but if someone here has another one available to provide the dipstick measurements (or you can find a reference online), just compare that the measurement to the splitline of the trans with the the one you have. Here's one I was checking in a bus when we made some changes; the bottom of the scale is at the splitline and I'm measuring the height to the dipstick markings. (I had a drawing to reference for the measurements.)
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Mike |
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#4
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After being filled and driven (with 2-3 upshifts), and refilled, the fluid should just barely drip out the Vac Mod hole when Mod removed.
So, calibrate your dip stick to that. could represent "overfilled" and if so the vent tube will puke it out, so add a rubber hose to the vent tube, tucking behind the Vac Mod for trapping the hose, and let the hose reach to the Pan floor, and cut level to pan floor. It's a dry idea. |
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#5
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Jeff |
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#6
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I'm expecting that they're pulling the modulator out immediately after shutting-down the fully-warm engine/transmission. Also assumes the vehicle is level front/rear, and left/right, and hasn't had the engine/trans tilt altered from stock via racing motor mounts or somesuch. Clearly, you couldn't jack-up the front or the side of the vehicle and cram a jack-stand or two under it while you pull the modulator. Confirmation, H.I.S? Overall...this is NOTmy first choice for verifying trans fluid level. If this was me, I'd A. Find a dipstick tube that fits the engine/trans--has the welded-on mounting bracket in the right place, correct bends, etc. B. Shove the dipstick into the tube. See how much pokes out the transmission end. Compare the amount of tube that gets crammed into the trans case, so that the "Full" mark on the dipstick is level with the pan gasket when the tube is (eventually) properly inserted into the trans, and the dipstick is properly inserted into the tube. C. While you're doing all this dicking-around with the dipstick tube, make sure the tube isn't cracked where it's rolled to form the O-ring groove that seals it to the case. IF (big IF) you have a choice, get a tube that uses the newer "top hat" seal rather than the O-ring. Last edited by Schurkey; 04-15-2023 at 12:20 AM. |
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#7
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Yez. Overall, i insist that attaining the correct level in a fresh, dry TH-400 install needs careful attention.
Back in the day, i'd use the taller Big Car Dipstick tubes for ease of service. Good O-ring, no sealers. These days, the "modern" dipstick tubes which use the grommet are superior in leak free operation. |
#8
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Thanks for all replies. I like Schurkeys way to establish level. Maybe we will double check level after getting up and running with modulator level method.
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#9
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I think if one cross referenced the year of trans and go to parts store, and say hi i need a new dipstick they sell you one from transdapt?? the correct tube and dipstick(granted is sport racing chrome though).
I lost my oil dip stick and did the above. I verified the measurement of the dipstick from another 69 gto car owner with stock oil pan and was exact match for the trandept/tansdept one I was sold so I called it a day and moved on? Food for thought?
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69 Gto, 390 posi gears,th400 w/jim hand converter/406 pontiac/#64 HEADS/ 10:1 compression/ 190 PSI with/ TRW 160 thou domes / hooker headers 1 7/8, PRW 1.5 rockers, 405 Crower Springs, Holley 750 vac with proform upgrade, Performer RPM on points / 284 H Single Pattern Crane |
#10
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Pull the pan with the dipstick properly installed and check that the full mark is 1/4" above the pan rail.
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'65 Tempest 467 3650# 11.30@120.31 |
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#11
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First of all the engine has to be running in order to check the fluid level. In neutral . If the dipstick is original to the tube you should be ok
You just have to worry about it fitting the car. |
#12
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Agreed, but to check the accuracy of the mark of a non original tube and stick would be prudent. Won't matter if the engine is on or off if the measuring device is wrong.
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'65 Tempest 467 3650# 11.30@120.31 |
#13
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When my transmission was rebuilt..my builder said not to use type F again..much for the reason in the previous post.
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#14
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They should all be the same, just upper part length and shape is different. The only thing that would be different is the depth of the pan. And that shouldn't make a difference.
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#15
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So just a little clarification. My understanding is fluid 1/4" above the Transmission pan rail, engine running, hot fluid. Thoughts? Thanks
I understand the thread is about measurement of the dip stick itself.
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68 Firebird. IA2 block, 505 cu in, SD Performance E-head, Solid roller 3600 weight. Reid TH400 4:11 gear. 29" slick. Best so far 9.95@134 mph. 1.43 60 ft. 76 Trans am, TKX .81 o/d, 3.73 Moser rearend, 468 with KRE D-ports, Doug headers, 3" Exh. |
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#16
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Ken '68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (build thread | walk around) '95 Comp T/A #6 M6 - bone stock (pics) |
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#17
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Then found the TCI ones. As a matter of fact, had the same issue with the 4L80e swap, which, basically uses the TH400 one. Couple members here came to me during 4L80e swaps, and told them TCI. Some didn't want to initially pump out what was considered a lot for a tube & stick, they too ended up with somewhat of a graveyard selection. I use the locking stick type though, but the non-locking one is fine. .
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#18
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Ken '68 GTO - 464 - Ram Air II heads - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac (build thread | walk around) '95 Comp T/A #6 M6 - bone stock (pics) |
#19
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Well, the non-locking one I used was from like 2007 or so, and I did check it. The locking ones I got in the 2007-2012 range, one last year, checked the 1st one, it was good. Sure I still have part numbers, at least for the 4L80e ones, looked that up not too long ago to provide info to others.
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. 1970 GTO Judge Tribute Pro-Tour Project 535 IA2 http://forums.maxperformanceinc.com/...d.php?t=760624 1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car https://forums.maxperformanceinc.com...ght=procharger Theme Song: http://www.youtube.com/watch?v=7zKAS...ature=youtu.be |
#20
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And it may be that 1/4" difference really doesn't make a difference, given that the vehicle when in motion is going to be subject to G-forces that will move the fluid around. Well, the stick in relation to the tube it's used with. |
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