tach in my 89 RS 305 doesn't function properly any more. it will "stick". rev car up to 4,000 rpm for example and it will stay at 4,000 rpm. im thinking of maybe getting an inexpensive aftermarket tach ($40) and maybe mounting it in a guage pod. i dont feel the factory tach is very accurate even if it is in perfect working order. so i dont want to really replace it with another factory tach. my car is an automatic but i tend to drive it harder than an average sedan and i like to know what my engine is doing. is there an aftermarket option that will fit like a factory tach, with the oil pressure gauge mounted in it. there are several companies that make a complete digital replacement kit for our cars, and i think they look sweet but at 500 bucks thats alot of money i need to spend elsewhere at this point in time. if i get a gauge pod i would now have a dead guage in my instrument panel. also if i bought a tach and somehow made it fit in my instrument panel, now i would have the problem of no oil pressure guage. what do you guys usually do?

 

im not sure if an 89 is mechanical like my 91 is, but mine did the same thing and i replaced the whole guage cluster with one i got off ebay and it worked perfectly, price with shipping was under a hundred dollars and took all of 30 minutes to replace, the hardest part is getting out the headlight ****. good luck with it.