smokin'joe Posted October 20, 2022 Share Posted October 20, 2022 54 minutes ago, tortron said: What does a top switch/high gear switch do on a manual gearbox. Obs. it's activated when it's in top gear. Tell the ecu to change something like lean burn or timing? winds up the volume on the Wuhan War Whistle on trubro cars !! 1 1 Quote Link to comment Share on other sites More sharing options...
tortron Posted October 20, 2022 Share Posted October 20, 2022 Datsun 1200 forum says from 76 Transmission Controlled Vacuum Advance System (TCVAS) disables spark advance except in Top Gear. Since this "retarded" spark timing reduces performance, to prevent cold-engine driving problems this system is bypassed in cold temperatures. This means vacuum advance works normally at cold temperatures. On the highway (in top gear) full power is always available. Assume it does a 90s version of that Best to bin it, I obviously want full clutch kicking power in all gears 1 Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 Evening Tech spammers. Got a shit of a prick of an arse of a gearbox I can't separate from a motor. Any ideas? It's a 1az avensis with manual gearbox with slipping clutch. Got everything apart I can see apart, 3 mounts off, crossmember is dangling but the gearbox is still stuck to the engine as if I hadn't touched it. Jacked up and down loads, had prybar on it, it'll seperate a mm or two but snap back into pos like it's bolted. Am I being a dumbarse? First toyota fwd box I've done. Quote Link to comment Share on other sites More sharing options...
mjrstar Posted October 20, 2022 Share Posted October 20, 2022 Is it a pull clutch? Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 5 minutes ago, mjrstar said: Is it a pull clutch? The replacement is push clutch, so hoping it's the right one. Quote Link to comment Share on other sites More sharing options...
mjrstar Posted October 20, 2022 Share Posted October 20, 2022 Well if it's not a pull clutch it sounds like it's stuck on a dowel, or friction plate stuck on the spline.. or maybe pilot bearing has input shaft jammed in there.. Once you are happy there is no hidden bolts I'd gently use the clutch pedal to see if that spreads things apart. 3 1 Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 That's a great idea tbh. I've already unbolted the slave so didn't really think about that I'll give it a go cheers Quote Link to comment Share on other sites More sharing options...
Metalhead96 Posted October 20, 2022 Share Posted October 20, 2022 Does it separate more on one side? Not 100% but there could be a bolt that goes from the engine through to the gearbox. Had it once on some euro trash and was hidden up and away from eye sight 1 Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 Not really, it seems like there's a bolt I'm missing tbh. I got a prybar in it but snaps back shut instantly. It hasn't seperatd at all. I must have missed something Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 I've googled up this image which is from a rav4. I don't recall seeing or undoing these three nuts, I'll have another look tomorrow. Doing this on axlestands on my driveway after work has me regretting life at the mo hah. 1 1 Quote Link to comment Share on other sites More sharing options...
ajg193 Posted October 20, 2022 Share Posted October 20, 2022 One time I was a real idiot and forgot to undo the bolts holding the sandwich plate/flyhweel cover on and had same symptoms 1 Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 No sandwich plate on this box that I can see Quote Link to comment Share on other sites More sharing options...
kws Posted October 20, 2022 Share Posted October 20, 2022 This listing appears to be for a 1AZ avensis box, if it helps with the bolt pattern https://www.ebay.co.uk/itm/223480998601 Dumb question, but the starter is removed, and there isnt a rear mount bracket attached to the box or anything? Quote Link to comment Share on other sites More sharing options...
MightyJoe Posted October 20, 2022 Share Posted October 20, 2022 Starter is off, IL need to check again that bolt beside the driveshaft. that's actually a great pic, thanks. Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 20, 2022 Share Posted October 20, 2022 I’m a total noob with efi and conversions. need info on what I should be doing for this efi fuel system for the 4age swap . I only have a low pressure line and pump on the car at the moment. im guessing that line can be used for the return line. do I need to use a surge tank or would it be fine directly from the tank with an inline efi pump? Quote Link to comment Share on other sites More sharing options...
tortron Posted October 20, 2022 Share Posted October 20, 2022 My ute is running like that for 20 years, no surge tank. 3 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 21, 2022 Share Posted October 21, 2022 Surge tanks arent a "must" but having the engine fall on its face when you're below a 1/4 tank gets old. Surge tanks are last century tech. All the cool kids fit an in-tank swirl pot. Not me, My aliexpress surge tank arrived about 6 weeks ago. 3 1 Quote Link to comment Share on other sites More sharing options...
RUNAMUCK Posted October 21, 2022 Share Posted October 21, 2022 22 hours ago, MightyJoe said: Evening Tech spammers. Got a shit of a prick of an arse of a gearbox I can't separate from a motor. Any ideas? It's a 1az avensis with manual gearbox with slipping clutch. Got everything apart I can see apart, 3 mounts off, crossmember is dangling but the gearbox is still stuck to the engine as if I hadn't touched it. Jacked up and down loads, had prybar on it, it'll seperate a mm or two but snap back into pos like it's bolted. Am I being a dumbarse? First toyota fwd box I've done. I had the same problem with that fucking cunting cocksucking 4x4 primera I had. The next day another set of eyes found a bolt we'd missed. 1 Quote Link to comment Share on other sites More sharing options...
shizzl Posted October 21, 2022 Share Posted October 21, 2022 I once had a gearbox stuck on a dowel/spline. gave it a big clutch kick and she popped off 1 Quote Link to comment Share on other sites More sharing options...
kws Posted October 21, 2022 Share Posted October 21, 2022 57 minutes ago, RUNAMUCK said: Surge tanks arent a "must" but having the engine fall on its face when you're below a 1/4 tank gets old. Agreed. The early TVR Tasmin had no surge tank and the pickup for the pump was at the front of the tanks. It was a real pain in the arse having all the fuel surge to the back of the tank, away from the pickups and lose all power when accelerating. Quote Link to comment Share on other sites More sharing options...
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